Ansar Bait al-Maqdis
Military investigations showed that one of the vehicles used was stolen from the previous incident on the same checkpoint. They also indicated that the attack was planned and that heavy cast bullets were found at the site. The slain attackers were held by authorities and were later identified as non-Egyptians by the military prosecutor. A security source suspected the involvement of Ansar Bait al-Maqdis, adding that an Islamic black standard was raised during the assault.