The insurgents managed to make a safe haven out of the western part of the city from where they continued to conduct hit and run attacks over the coming months. One of the more notable attacks came just a month after the fighting ceased, when a suicide bomber dressed like an Iraqi soldier managed to get into the mess tent on an American base called Forward Operating Base Marez, and detonated himself – killing 22 people, including 14 American soldiers. The insurgent group known as Jaish Ansar al-Sunna claimed responsibility for the attack.