Orlando killer appears to have been homegrown extremist

Brett Crowe, right, sits with friend Myron McCullough, down the street from the scene of the fatal shooting at a nightclub Monday, June 13, 2016, in Orlando, Fla. Crowe was supposed to go the club the night of the shooting but decided in the last minute he didn't want to drive. (AP Photo/David Goldman)
ORLANDO, Fla. (AP) - The gunman whose attack on a gay nightclub left 49 victims dead appears to have been a "homegrown extremist" who espoused support for a jumble of often-conflicting Islamic radical groups, the White House and the FBI said Monday.

As Orlando mourned its dead with flowers, candles and vigils, counterterrorism investigators dug into the background of 29-year-old Omar Mateen, the American-born Muslim who carried out the deadliest mass shooting in modern U.S. history.

"So far, we see no indication that this was a plot directed from outside the United States, and we see no indication that he was part of any kind of network," said FBI Director James Comey.