diff --git a/src/DI.php b/src/DI.php
index 59f48fcb5..bf2b5a237 100644
--- a/src/DI.php
+++ b/src/DI.php
@@ -532,6 +532,16 @@ abstract class DI
 		return self::$dice->create(Contact\Introduction\Factory\Introduction::class);
 	}
 
+	public static function report(): Moderation\Repository\Report
+	{
+		return self::$dice->create(Moderation\Repository\Report::class);
+	}
+
+	public static function reportFactory(): Moderation\Factory\Report
+	{
+		return self::$dice->create(Moderation\Factory\Report::class);
+	}
+
 	public static function localRelationship(): Contact\LocalRelationship\Repository\LocalRelationship
 	{
 		return self::$dice->create(Contact\LocalRelationship\Repository\LocalRelationship::class);
diff --git a/src/Protocol/ActivityPub/Processor.php b/src/Protocol/ActivityPub/Processor.php
index d689ba72a..a4333217d 100644
--- a/src/Protocol/ActivityPub/Processor.php
+++ b/src/Protocol/ActivityPub/Processor.php
@@ -1821,6 +1821,39 @@ class Processor
 		Queue::remove($activity);
 	}
 
+	/**
+	 * Report a user
+	 *
+	 * @param array $activity
+	 * @return void
+	 * @throws \Exception
+	 */
+	public static function ReportAccount(array $activity)
+	{
+		$account_id = Contact::getIdForURL($activity['object_id']);
+		if (empty($account_id)) {
+			Logger::info('Unknown account', ['activity' => $activity]);
+			Queue::remove($activity);
+			return;
+		}
+
+		$status_ids = $activity['object_ids'];
+		array_shift($status_ids);
+
+		$uri_ids = [];
+		foreach ($status_ids as $status_id) {
+			$post = Post::selectFirst(['uri-id'], ['uri' => $status_id]);
+			if (!empty($post['uri-id'])) {
+				$uri_ids[] = $post['uri-id'];
+			}
+		}
+
+		$report = DI::reportFactory()->createFromReportsRequest(0, $account_id, $activity['content'], false, $uri_ids);
+		DI::report()->save($report);
+
+		Logger::info('Stored report', ['account_id' => $account_id, 'comment' => $activity['content'], 'status_ids' => $status_ids]);
+	}
+
 	/**
 	 * Accept a follow request
 	 *
diff --git a/src/Protocol/ActivityPub/Receiver.php b/src/Protocol/ActivityPub/Receiver.php
index cb76ca7e1..85965d712 100644
--- a/src/Protocol/ActivityPub/Receiver.php
+++ b/src/Protocol/ActivityPub/Receiver.php
@@ -406,7 +406,14 @@ class Receiver
 		}
 
 		// Any activities on account types must not be altered
-		if (in_array($object_type, self::ACCOUNT_TYPES)) {
+		if (in_array($type, ['as:Flag'])) {
+			$object_data = [];
+			$object_data['id'] = JsonLD::fetchElement($activity, '@id');
+			$object_data['object_id'] = JsonLD::fetchElement($activity, 'as:object', '@id');
+			$object_data['object_ids'] = JsonLD::fetchElementArray($activity, 'as:object', '@id');
+			$object_data['content'] = JsonLD::fetchElement($activity, 'as:content', '@type');
+			$object_data['push'] = $push;
+		} elseif (in_array($object_type, self::ACCOUNT_TYPES)) {
 			$object_data = [];
 			$object_data['id'] = JsonLD::fetchElement($activity, '@id');
 			$object_data['object_id'] = JsonLD::fetchElement($activity, 'as:object', '@id');
@@ -843,6 +850,14 @@ class Receiver
 				}
 				break;
 
+			case 'as:Flag':
+				if (in_array($object_data['object_type'], self::ACCOUNT_TYPES)) {
+					ActivityPub\Processor::ReportAccount($object_data);
+				} else {
+					return false;
+				}
+				break;
+	
 			case 'as:Remove':
 				if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
 					ActivityPub\Processor::removeFromFeaturedCollection($object_data);