A gunman killed 50 people at a gay nightclub in Orlando, Florida, early Sunday, marking the deadliest mass shooting in U.S. history.
- The gunman has been identified as Omar Saddiqui Mateen, according to two law enforcement officials. Police say they killed him.
- The shooter called 911, pledged allegiance to ISIS and mentioned the Boston bombers, according to a U.S. official.
- At least 53 people were injured in the attack.
- The scope of the bloodshed spurred Orlando Mayor Buddy Dyer to declare a state of emergency and request that Gov. Rick Scott do the same.