Deadliest shooting in American history leaves at least 50 slain at Orlando gay club; gunman pledged allegiance to ISIS, mentioned Boston bombers in 911 call

A terrorist who pledged allegiance to ISIS sprayed bullets from an automatic weapon, killing 50 people and wounding 53 others at a popular gay club in Orlando early Sunday — the deadliest shooting in U.S. history.

Omar Mateen, an American citizen whose parents were born in Afghanistan, died in a shootout with police following a three-hour standoff at the Pulse nightclub.
Mateen, of Fort Pierce, Fla., called 911 about 20 minutes into the shooting, which started just after 2 a.m., according to CNN. In the phone call, he pledged allegiance to ISIS and referenced the Tsarnaev brothers who carried out the deadly 2013 bombing of the Boston Marathon.