diff --git a/src/mibew/libs/classes/Mibew/Controller/Group/ManagementController.php b/src/mibew/libs/classes/Mibew/Controller/Group/ManagementController.php
index b630dd2c..7dd39d7e 100644
--- a/src/mibew/libs/classes/Mibew/Controller/Group/ManagementController.php
+++ b/src/mibew/libs/classes/Mibew/Controller/Group/ManagementController.php
@@ -97,13 +97,9 @@ class ManagementController extends AbstractController
     {
         csrf_check_token($request);
 
-        $db = Database::getInstance();
-
         // Remove the group and all its relations.
         $group_id = $request->attributes->getInt('group_id');
-        $db->query("DELETE FROM {opgroup} WHERE groupid = ?", array($group_id));
-        $db->query("DELETE FROM {operatortoopgroup} WHERE groupid = ?", array($group_id));
-        $db->query("UPDATE {thread} SET groupid = 0 WHERE groupid = ?", array($group_id));
+        delete_group($group_id);
 
         // Redirect user to canned messages list. Use only "sortby" and
         // "sortdirection" get params for the target URL.
diff --git a/src/mibew/libs/groups.php b/src/mibew/libs/groups.php
index bcf8cb30..b4b7f5c6 100644
--- a/src/mibew/libs/groups.php
+++ b/src/mibew/libs/groups.php
@@ -444,3 +444,16 @@ function update_group_members($group_id, $new_value)
         );
     }
 }
+
+/**
+ * Deletes a group with specified ID.
+ *
+ * @param int $group_id ID of the group that should be deleted.
+ */
+function delete_group($group_id)
+{
+    $db = Database::getInstance();
+    $db->query("DELETE FROM {opgroup} WHERE groupid = ?", array($group_id));
+    $db->query("DELETE FROM {operatortoopgroup} WHERE groupid = ?", array($group_id));
+    $db->query("UPDATE {thread} SET groupid = 0 WHERE groupid = ?", array($group_id));
+}