President Barack Obama called the attack 'an act of terror and hate.'.Mateen had security and firearm licenses and the gunman's weapons were legally purchased within the past week.The names of the first victims identified in the shooting include seven men between the ages of 20 and 36 years old.He twice had been investigated by federally authorities for alleged comments he made about terrorism, but both investigations were closed. The gunman called 911 before the attack, expressing fealty to ISIS.ET with a handgun and a Sig Sauer MCX, an AR-15-style rifle, officials said. The massacre - the worst mass shooting in the history of the United States - began when the gunman stormed the Pulse Nightclub about 2 a.m. The shooter, identified by several law enforcement sources as Omar Mateen, 29, was killed in a shootout with law enforcement after a three-hour siege. At least 50 people were killed and more than 50 others were wounded when a gunman opened fire and took hostages at a gay nightclub in Orlando, Florida, early Sunday morning.
