On June 10, 2017, during the Marawi crisis, the Philippine Army claimed that the Maute brothers had been killed in a firefight, although details were not available. On September 4, 2017, the military announced that Abdullah was killed in August 7 2017 in an airstrike. They cited ISIL sympathizers proclaiming his death as an act of martyrdom on the social media platform Telegram. He was referred to as "Sheik Al Miyahad Abu Al Hassan", the name he was known to have used within the ISIL network. In September 2017, the military stated that Omar alone among the seven Maute brothers remained alive, as the other six were killed in battle.