Orlando, Florida (CNN)An American-born man who'd pledged allegiance to ISIS gunned down 49 people early Sunday at a gay nightclub in Orlando, the deadliest mass shooting in the United States and the nation's worst terror attack since 9/11, authorities said.
* The gunman, Omar Mateen, 29, of Fort Pierce, Florida, was interviewed by the FBI in 2013 and 2014 but was not found to be a threat, the FBI said.
* Mateen called 911 during the attack to pledge allegiance to ISIS and mentioned the Boston Marathon bombers, according to a U.S. official.
* Orlando police shot and killed Mateen.
* Mateen's ex-wife said she thinks he was mentally ill.
Mateen carried an assault rifle and a pistol into the packed Pulse club about 2 a.m. Sunday and started shooting, killing 49 people and wounding at least 53, officials said.
After a standoff of about three hours, while people trapped inside the club desperately called and messaged friends and relatives, police crashed into the building with an armored vehicle and stun grenades and killed Mateen.
"It appears he was organized and well-prepared," Orlando Police Chief John Mina said early Sunday. Authorities said they haven't found any accomplices.
'An act of hate'
There has been no claim of responsibility for the attack on jihadi forums, but ISIS sympathizers have reacted by praising the attack on pro-Islamic State forums.
"We know enough to say this was an act of terror and act of hate," President Obama said in an address to the nation from the White House.
While the violence could have hit any American community, "This is an especially heartbreaking day for our friends who are lesbian, gay, bisexual or transgender," he said.
Omar Mir Seddique Mateen was born in 1986 in New York. Most recently he lived in Fort Pierce, about 120 miles southeast of Orlando. Fearing explosives, police evacuated about 200 people from the apartment complex where he lived while they looked through his residence for evidence.
Mateen's parents, who are from Afghanistan, said he'd expressed outrage after seeing two men kiss in Miami, but they didn't consider him particularly religious and didn't know of any connection he had to ISIS.
He was married in 2009 to a woman originally from Uzbekistan, according to the marriage license, but he filed documents to end the marriage in 2011.
Sitora Yusufiy, interviewed by CNN in Boulder, Colorado, said she and Mateen were together about four months, though it took a long time to complete the divorce because they lived in different parts of the country after separating.
Mateen was a normal husband at the beginning of their marriage but started abusing her after a few months, she said. She said Mateen was bipolar, although he was not formally diagnosed. She also said Mateen had a history with steroids. He was religious but she said she doesn't think his religion played in to the attack.
* The gunman, Omar Mateen, 29, of Fort Pierce, Florida, was interviewed by the FBI in 2013 and 2014 but was not found to be a threat, the FBI said.
* Mateen called 911 during the attack to pledge allegiance to ISIS and mentioned the Boston Marathon bombers, according to a U.S. official.
* Orlando police shot and killed Mateen.
* Mateen's ex-wife said she thinks he was mentally ill.
Mateen carried an assault rifle and a pistol into the packed Pulse club about 2 a.m. Sunday and started shooting, killing 49 people and wounding at least 53, officials said.
After a standoff of about three hours, while people trapped inside the club desperately called and messaged friends and relatives, police crashed into the building with an armored vehicle and stun grenades and killed Mateen.
"It appears he was organized and well-prepared," Orlando Police Chief John Mina said early Sunday. Authorities said they haven't found any accomplices.
'An act of hate'
There has been no claim of responsibility for the attack on jihadi forums, but ISIS sympathizers have reacted by praising the attack on pro-Islamic State forums.
"We know enough to say this was an act of terror and act of hate," President Obama said in an address to the nation from the White House.
While the violence could have hit any American community, "This is an especially heartbreaking day for our friends who are lesbian, gay, bisexual or transgender," he said.
Omar Mir Seddique Mateen was born in 1986 in New York. Most recently he lived in Fort Pierce, about 120 miles southeast of Orlando. Fearing explosives, police evacuated about 200 people from the apartment complex where he lived while they looked through his residence for evidence.
Mateen's parents, who are from Afghanistan, said he'd expressed outrage after seeing two men kiss in Miami, but they didn't consider him particularly religious and didn't know of any connection he had to ISIS.
He was married in 2009 to a woman originally from Uzbekistan, according to the marriage license, but he filed documents to end the marriage in 2011.
Sitora Yusufiy, interviewed by CNN in Boulder, Colorado, said she and Mateen were together about four months, though it took a long time to complete the divorce because they lived in different parts of the country after separating.
Mateen was a normal husband at the beginning of their marriage but started abusing her after a few months, she said. She said Mateen was bipolar, although he was not formally diagnosed. She also said Mateen had a history with steroids. He was religious but she said she doesn't think his religion played in to the attack.
