diff --git a/source/java/org/alfresco/repo/web/scripts/comments/CommentDelete.java b/source/java/org/alfresco/repo/web/scripts/comments/CommentDelete.java
index eddf7071cd..3434ef7788 100644
--- a/source/java/org/alfresco/repo/web/scripts/comments/CommentDelete.java
+++ b/source/java/org/alfresco/repo/web/scripts/comments/CommentDelete.java
@@ -68,6 +68,24 @@ public class CommentDelete extends AbstractCommentsWebScript
             parentNodeRef = new NodeRef((String) getOrNull(jsonPageParams, JSON_KEY_NODEREF));
         }
 
+        if (parentNodeRef == null)
+        {
+            // find the parent content node for the comment
+            // Example would be a blog post which will have the following structure:
+            // blog post -> forum node -> topic node -> the actual comment node
+            NodeRef topicNodeRef = nodeService.getPrimaryParent(nodeRef).getParentRef();
+            if (topicNodeRef == null || !nodeService.getType(topicNodeRef).equals(ForumModel.TYPE_TOPIC))
+            {
+                throw new IllegalArgumentException("The NodeRef specified is not a child of the topic.");
+            }
+            NodeRef forumNodeRef = nodeService.getPrimaryParent(topicNodeRef).getParentRef();
+            if (forumNodeRef == null || !nodeService.getType(forumNodeRef).equals(ForumModel.TYPE_FORUM))
+            {
+                throw new IllegalArgumentException("The NodeRef specified doesn't belong to a correct structure of forums.");
+            }
+            parentNodeRef = nodeService.getPrimaryParent(forumNodeRef).getParentRef();
+        }
+
         if (parentNodeRef != null)
         {
             this.behaviourFilter.disableBehaviour(parentNodeRef, ContentModel.ASPECT_AUDITABLE);
diff --git a/source/test-java/org/alfresco/repo/web/scripts/blogs/BlogServiceTest.java b/source/test-java/org/alfresco/repo/web/scripts/blogs/BlogServiceTest.java
index 97ccf522d0..39a9a3c304 100644
--- a/source/test-java/org/alfresco/repo/web/scripts/blogs/BlogServiceTest.java
+++ b/source/test-java/org/alfresco/repo/web/scripts/blogs/BlogServiceTest.java
@@ -1,28 +1,28 @@
-/*
- * #%L
- * Alfresco Remote API
- * %%
- * Copyright (C) 2005 - 2016 Alfresco Software Limited
- * %%
- * This file is part of the Alfresco software. 
- * If the software was purchased under a paid Alfresco license, the terms of 
- * the paid license agreement will prevail.  Otherwise, the software is 
- * provided under the following open source license terms:
- * 
- * Alfresco is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * Alfresco is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Lesser General Public License for more details.
- * 
- * You should have received a copy of the GNU Lesser General Public License
- * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
- * #L%
- */
+/*
+ * #%L
+ * Alfresco Remote API
+ * %%
+ * Copyright (C) 2005 - 2016 Alfresco Software Limited
+ * %%
+ * This file is part of the Alfresco software. 
+ * If the software was purchased under a paid Alfresco license, the terms of 
+ * the paid license agreement will prevail.  Otherwise, the software is 
+ * provided under the following open source license terms:
+ * 
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ * #L%
+ */
 package org.alfresco.repo.web.scripts.blogs;
 
 import java.util.ArrayList;
@@ -31,11 +31,15 @@ import java.util.Collections;
 import java.util.List;
 
 import org.alfresco.model.ContentModel;
+import org.alfresco.repo.activities.feed.FeedGenerator;
+import org.alfresco.repo.activities.post.lookup.PostLookup;
+import org.alfresco.repo.management.subsystems.ChildApplicationContextFactory;
 import org.alfresco.repo.node.archive.NodeArchiveService;
 import org.alfresco.repo.security.authentication.AuthenticationComponent;
 import org.alfresco.repo.security.authentication.AuthenticationUtil;
 import org.alfresco.repo.site.SiteModel;
 import org.alfresco.repo.web.scripts.BaseWebScriptTest;
+import org.alfresco.service.cmr.activities.ActivityService;
 import org.alfresco.service.cmr.repository.NodeRef;
 import org.alfresco.service.cmr.security.MutableAuthenticationService;
 import org.alfresco.service.cmr.security.PersonService;
@@ -49,6 +53,7 @@ import org.apache.commons.logging.LogFactory;
 import org.json.JSONArray;
 import org.json.JSONObject;
 import org.json.JSONStringer;
+import org.springframework.context.ApplicationContext;
 import org.springframework.extensions.webscripts.Status;
 import org.springframework.extensions.webscripts.TestWebScriptServer.DeleteRequest;
 import org.springframework.extensions.webscripts.TestWebScriptServer.GetRequest;
@@ -71,7 +76,10 @@ public class BlogServiceTest extends BaseWebScriptTest
     private PersonService personService;
     private SiteService siteService;
     private NodeArchiveService nodeArchiveService;
-    
+    private ActivityService activityService;
+    private FeedGenerator feedGenerator;
+    private PostLookup postLookup;
+
     private static final String USER_ONE = "UserOneSecondToo";
     private static final String USER_TWO = "UserTwoSecondToo";
     private static final String SITE_SHORT_NAME_BLOG = "BlogSiteShortNameTest";
@@ -102,7 +110,12 @@ public class BlogServiceTest extends BaseWebScriptTest
         this.personService = (PersonService)getServer().getApplicationContext().getBean("PersonService");
         this.siteService = (SiteService)getServer().getApplicationContext().getBean("SiteService");
         this.nodeArchiveService = (NodeArchiveService)getServer().getApplicationContext().getBean("nodeArchiveService");
-        
+        this.activityService = (ActivityService)getServer().getApplicationContext().getBean("activityService");
+        ChildApplicationContextFactory activitiesFeed = (ChildApplicationContextFactory)getServer().getApplicationContext().getBean("ActivitiesFeed");
+        ApplicationContext activitiesFeedCtx = activitiesFeed.getApplicationContext();
+        this.feedGenerator = (FeedGenerator)activitiesFeedCtx.getBean("feedGenerator");
+        this.postLookup = (PostLookup)activitiesFeedCtx.getBean("postLookup");
+
         // Authenticate as user
         this.authenticationComponent.setCurrentUser(AuthenticationUtil.getAdminUserName());
         
@@ -281,6 +294,7 @@ public class BlogServiceTest extends BaseWebScriptTest
         JSONObject comment = new JSONObject();
         comment.put("title", title);
         comment.put("content", content);
+        comment.put("site", SITE_SHORT_NAME_BLOG);
         Response response = sendRequest(new PostRequest(getCommentsUrl(nodeRef), comment.toString(), "application/json"), expectedStatus);
 
         if (expectedStatus != 200)
@@ -728,7 +742,32 @@ public class BlogServiceTest extends BaseWebScriptTest
         assertEquals("new title", commentTwoUpdated.getString("title"));
         assertEquals("new content", commentTwoUpdated.getString("content"));
     }
-    
+
+    /**
+     * REPO-828 (MNT-16401)
+     * @throws Exception
+     */
+    public void testDeleteCommentPostActivity() throws Exception
+    {
+        this.authenticationComponent.setCurrentUser(USER_ONE);
+        JSONObject item = createPost("testActivity", "test", null, false, 200);
+        postLookup.execute();
+        feedGenerator.execute();
+        int activityNumStart = activityService.getUserFeedEntries(USER_ONE, SITE_SHORT_NAME_BLOG).size();
+        String nodeRef = item.getString("nodeRef");
+        JSONObject commentOne = createComment(nodeRef, "comment", "content", 200);
+        postLookup.execute();
+        feedGenerator.execute();
+        int activityNumNext = activityService.getUserFeedEntries(USER_ONE, SITE_SHORT_NAME_BLOG).size();
+        assertEquals("The activity feeds were not generated after adding a comment", activityNumStart + 1, activityNumNext);
+
+        sendRequest(new DeleteRequest(getCommentUrl(commentOne.getString("nodeRef"))), 200);
+        postLookup.execute();
+        feedGenerator.execute();
+        activityNumNext = activityService.getUserFeedEntries(USER_ONE, SITE_SHORT_NAME_BLOG).size();
+        assertEquals("The activity feeds were not generated after deleting a comment", activityNumStart + 1, activityNumNext);
+    }
+
     /**
      * You can attach information to the blog container relating
      *  to integration with external blogs.
diff --git a/source/test-java/org/alfresco/repo/web/scripts/comment/CommentsApiTest.java b/source/test-java/org/alfresco/repo/web/scripts/comment/CommentsApiTest.java
index 1500c715a2..61c79ef9c6 100644
--- a/source/test-java/org/alfresco/repo/web/scripts/comment/CommentsApiTest.java
+++ b/source/test-java/org/alfresco/repo/web/scripts/comment/CommentsApiTest.java
@@ -1,28 +1,28 @@
-/*
- * #%L
- * Alfresco Remote API
- * %%
- * Copyright (C) 2005 - 2016 Alfresco Software Limited
- * %%
- * This file is part of the Alfresco software. 
- * If the software was purchased under a paid Alfresco license, the terms of 
- * the paid license agreement will prevail.  Otherwise, the software is 
- * provided under the following open source license terms:
- * 
- * Alfresco is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * Alfresco is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Lesser General Public License for more details.
- * 
- * You should have received a copy of the GNU Lesser General Public License
- * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
- * #L%
- */
+/*
+ * #%L
+ * Alfresco Remote API
+ * %%
+ * Copyright (C) 2005 - 2016 Alfresco Software Limited
+ * %%
+ * This file is part of the Alfresco software. 
+ * If the software was purchased under a paid Alfresco license, the terms of 
+ * the paid license agreement will prevail.  Otherwise, the software is 
+ * provided under the following open source license terms:
+ * 
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ * #L%
+ */
 package org.alfresco.repo.web.scripts.comment;
 
 import java.io.IOException;
@@ -34,7 +34,10 @@ import javax.transaction.UserTransaction;
 
 import org.alfresco.error.AlfrescoRuntimeException;
 import org.alfresco.model.ContentModel;
+import org.alfresco.repo.activities.feed.FeedGenerator;
+import org.alfresco.repo.activities.post.lookup.PostLookup;
 import org.alfresco.repo.content.MimetypeMap;
+import org.alfresco.repo.management.subsystems.ChildApplicationContextFactory;
 import org.alfresco.repo.node.archive.NodeArchiveService;
 import org.alfresco.repo.security.authentication.AuthenticationComponent;
 import org.alfresco.repo.security.authentication.AuthenticationUtil;
@@ -44,6 +47,7 @@ import org.alfresco.repo.security.permissions.impl.ModelDAO;
 import org.alfresco.repo.security.permissions.impl.SimplePermissionEntry;
 import org.alfresco.repo.site.SiteModel;
 import org.alfresco.repo.web.scripts.BaseWebScriptTest;
+import org.alfresco.service.cmr.activities.ActivityService;
 import org.alfresco.service.cmr.model.FileFolderService;
 import org.alfresco.service.cmr.repository.NodeRef;
 import org.alfresco.service.cmr.repository.NodeService;
@@ -107,6 +111,9 @@ public class CommentsApiTest extends BaseWebScriptTest
     private AuthenticationComponent authenticationComponent;
     protected PermissionServiceSPI permissionService;
     protected ModelDAO permissionModelDAO;
+    private ActivityService activityService;
+    private FeedGenerator feedGenerator;
+    private PostLookup postLookup;
 
     private NodeRef rootNodeRef;
     private NodeRef companyHomeNodeRef;
@@ -144,6 +151,11 @@ public class CommentsApiTest extends BaseWebScriptTest
         siteService = (SiteService)getServer().getApplicationContext().getBean("SiteService");
         personService = (PersonService)getServer().getApplicationContext().getBean("PersonService");
         nodeArchiveService = (NodeArchiveService)getServer().getApplicationContext().getBean("nodeArchiveService");
+        activityService = (ActivityService)getServer().getApplicationContext().getBean("activityService");
+        ChildApplicationContextFactory activitiesFeed = (ChildApplicationContextFactory)getServer().getApplicationContext().getBean("ActivitiesFeed");
+        ApplicationContext activitiesFeedCtx = activitiesFeed.getApplicationContext();
+        feedGenerator = (FeedGenerator)activitiesFeedCtx.getBean("feedGenerator");
+        postLookup = (PostLookup)activitiesFeedCtx.getBean("postLookup");
 
         AuthenticationUtil.setFullyAuthenticatedUser(AuthenticationUtil.getAdminUserName());
         
@@ -620,7 +632,33 @@ public class CommentsApiTest extends BaseWebScriptTest
         assertEquals(modifiedDateBefore.getTime(), modifiedDateAfter.getTime());
         assertEquals(modifierBefore, modifierAfter);
     }
-    
+
+    /**
+     * REPO-828 (MNT-16401)
+     * @throws Exception
+     */
+    public void testDeleteCommentPostActivity() throws Exception
+    {
+        permissionService.setPermission(sitePage, USER_TWO, PermissionService.ALL_PERMISSIONS, true);
+        postLookup.execute();
+        feedGenerator.execute();
+        int activityNumStart = activityService.getSiteFeedEntries(SITE_SHORT_NAME).size();
+        Response response = addComment(sitePage, USER_TWO, 200);
+        postLookup.execute();
+        feedGenerator.execute();
+        int activityNumNext = activityService.getSiteFeedEntries(SITE_SHORT_NAME).size();
+        assertEquals("The activity feeds were not generated after adding a comment", activityNumStart + 1, activityNumNext);
+        JSONObject jsonResponse = parseResponseJSON(response);
+        String nodeRefComment = getOrNull(jsonResponse, JSON_KEY_NODEREF);
+        NodeRef commentNodeRef = new NodeRef(nodeRefComment);
+        deleteComment(commentNodeRef, sitePage, USER_TWO, 200);
+        activityNumStart = activityNumNext;
+        postLookup.execute();
+        feedGenerator.execute();
+        activityNumNext = activityService.getSiteFeedEntries(SITE_SHORT_NAME).size();
+        assertEquals("The activity feeds were not generated after deleting a comment", activityNumStart + 1, activityNumNext);
+    }
+
     /**
      * MNT-12082
      */
diff --git a/source/test-java/org/alfresco/repo/web/scripts/links/LinksRestApiTest.java b/source/test-java/org/alfresco/repo/web/scripts/links/LinksRestApiTest.java
index 5f189cdeec..58fb734545 100644
--- a/source/test-java/org/alfresco/repo/web/scripts/links/LinksRestApiTest.java
+++ b/source/test-java/org/alfresco/repo/web/scripts/links/LinksRestApiTest.java
@@ -1,28 +1,28 @@
-/*
- * #%L
- * Alfresco Remote API
- * %%
- * Copyright (C) 2005 - 2016 Alfresco Software Limited
- * %%
- * This file is part of the Alfresco software. 
- * If the software was purchased under a paid Alfresco license, the terms of 
- * the paid license agreement will prevail.  Otherwise, the software is 
- * provided under the following open source license terms:
- * 
- * Alfresco is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * Alfresco is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Lesser General Public License for more details.
- * 
- * You should have received a copy of the GNU Lesser General Public License
- * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
- * #L%
- */
+/*
+ * #%L
+ * Alfresco Remote API
+ * %%
+ * Copyright (C) 2005 - 2016 Alfresco Software Limited
+ * %%
+ * This file is part of the Alfresco software. 
+ * If the software was purchased under a paid Alfresco license, the terms of 
+ * the paid license agreement will prevail.  Otherwise, the software is 
+ * provided under the following open source license terms:
+ * 
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ * #L%
+ */
 package org.alfresco.repo.web.scripts.links;
 
 import java.util.Arrays;
@@ -33,12 +33,16 @@ import java.util.List;
 import javax.transaction.UserTransaction;
 
 import org.alfresco.model.ContentModel;
+import org.alfresco.repo.activities.feed.FeedGenerator;
+import org.alfresco.repo.activities.post.lookup.PostLookup;
+import org.alfresco.repo.management.subsystems.ChildApplicationContextFactory;
 import org.alfresco.repo.node.archive.NodeArchiveService;
 import org.alfresco.repo.policy.BehaviourFilter;
 import org.alfresco.repo.security.authentication.AuthenticationComponent;
 import org.alfresco.repo.security.authentication.AuthenticationUtil;
 import org.alfresco.repo.site.SiteModel;
 import org.alfresco.repo.web.scripts.BaseWebScriptTest;
+import org.alfresco.service.cmr.activities.ActivityService;
 import org.alfresco.service.cmr.repository.NodeRef;
 import org.alfresco.service.cmr.repository.NodeService;
 import org.alfresco.service.cmr.security.MutableAuthenticationService;
@@ -54,6 +58,7 @@ import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.json.JSONArray;
 import org.json.JSONObject;
+import org.springframework.context.ApplicationContext;
 import org.springframework.extensions.webscripts.Status;
 import org.springframework.extensions.webscripts.TestWebScriptServer.DeleteRequest;
 import org.springframework.extensions.webscripts.TestWebScriptServer.GetRequest;
@@ -81,6 +86,9 @@ public class LinksRestApiTest extends BaseWebScriptTest
     private NodeService internalNodeService;
     private SiteService siteService;
     private NodeArchiveService nodeArchiveService;
+    private ActivityService activityService;
+    private FeedGenerator feedGenerator;
+    private PostLookup postLookup;
     
     private static final String USER_ONE = "UserOneSecondToo";
     private static final String USER_TWO = "UserTwoSecondToo";
@@ -119,7 +127,13 @@ public class LinksRestApiTest extends BaseWebScriptTest
         this.siteService = (SiteService)getServer().getApplicationContext().getBean("SiteService");
         this.internalNodeService = (NodeService)getServer().getApplicationContext().getBean("nodeService");
         this.nodeArchiveService = (NodeArchiveService)getServer().getApplicationContext().getBean("nodeArchiveService");
-        
+        this.activityService = (ActivityService)getServer().getApplicationContext().getBean("activityService");
+        ChildApplicationContextFactory activitiesFeed = (ChildApplicationContextFactory)getServer().getApplicationContext().getBean("ActivitiesFeed");
+        ApplicationContext activitiesFeedCtx = activitiesFeed.getApplicationContext();
+        this.feedGenerator = (FeedGenerator)activitiesFeedCtx.getBean("feedGenerator");
+        this.postLookup = (PostLookup)activitiesFeedCtx.getBean("postLookup");
+
+
         // Authenticate as user
         this.authenticationComponent.setCurrentUser(AuthenticationUtil.getAdminUserName());
         
@@ -767,4 +781,55 @@ public class LinksRestApiTest extends BaseWebScriptTest
         
         assertTrue("The user sould have permission to create a new link.", Boolean.parseBoolean(result.getJSONObject("metadata").getJSONObject("linkPermissions").getString("create")));
     }
+
+    public void testCommentLink() throws Exception
+    {
+        JSONObject link = createLink(LINK_TITLE_ONE, "commented link", LINK_URL_ONE, false, Status.STATUS_OK);
+        postLookup.execute();
+        feedGenerator.execute();
+        int activityNumStart = activityService.getUserFeedEntries(USER_ONE, SITE_SHORT_NAME_LINKS).size();
+        String name = getNameFromLink(link);
+        link = getLink(name, Status.STATUS_OK);
+        String nodeRef = link.getString("nodeRef");
+        JSONObject commentOne = createComment(nodeRef, "comment", "content", 200);
+        postLookup.execute();
+        feedGenerator.execute();
+        int activityNumNext = activityService.getUserFeedEntries(USER_ONE, SITE_SHORT_NAME_LINKS).size();
+        assertEquals("The activity feeds were not generated after adding a comment", activityNumStart + 1, activityNumNext);
+
+        sendRequest(new DeleteRequest(getCommentUrl(commentOne.getString("nodeRef"))), 200);
+        postLookup.execute();
+        feedGenerator.execute();
+        activityNumNext = activityService.getUserFeedEntries(USER_ONE, SITE_SHORT_NAME_LINKS).size();
+        assertEquals("The activity feeds were not generated after deleting a comment", activityNumStart + 1, activityNumNext);
+    }
+
+    private JSONObject createComment(String nodeRef, String title, String content, int expectedStatus)
+            throws Exception
+    {
+        JSONObject comment = new JSONObject();
+        comment.put("title", title);
+        comment.put("content", content);
+        comment.put("site", SITE_SHORT_NAME_LINKS);
+        Response response = sendRequest(new PostRequest(getCommentsUrl(nodeRef), comment.toString(), "application/json"), expectedStatus);
+
+        if (expectedStatus != 200)
+        {
+            return null;
+        }
+
+        //logger.debug("Comment created: " + response.getContentAsString());
+        JSONObject result = new JSONObject(response.getContentAsString());
+        return result.getJSONObject("item");
+    }
+
+    private String getCommentsUrl(String nodeRef)
+    {
+        return "/api/node/" + nodeRef.replace("://", "/") + "/comments";
+    }
+
+    private String getCommentUrl(String nodeRef)
+    {
+        return "/api/comment/node/" + nodeRef.replace("://", "/");
+    }
 }