In a nine-one-one contact designed soon proper after the shooting commenced, Mateen swore allegiance to the leader of the Islamic State of Iraq and Syria, Abu Bakr al-Baghdadi, and explained the U.S. In response, Mateen withdrew again into the nightclub and ongoing shooting victims as he traversed by way of the constructing, at times firing into bodies devoid of checking irrespective of if they have been being by now useless.