Authorities have named Omar Saddiqui Mateen, 29, as the shooter responsible for the deadliest mass shooting in U.S. history. According to reports, Mateen entered Orlando’s Pulse, a gay nightclub, around 2 a.m. Sunday morning took hostages and opened fire, leaving 50 people dead and at least 53 injured in his wake.
CNN reports that Mateen had pledged allegiance to ISIS in a phone call around the time of the attack and has a history of suspected ties to extremist groups but wasn’t currently under investigation.
“It appears he was organized and well-prepared,” said Orlando Police Chief John Mina.
The club was reportedly packed with more than 300 people when Mateen entered the building, after exchanging fire with a police officer outside. Witnesses say that the shooting lasted minutes – “long enough to last a whole song,” according to Christopher Hansen.