The American gunman who launched a murderous assault on a gay nightclub in Orlando was radicalized by Islamist propaganda, officials said Monday, as they grappled with the worst terror attack on US soil since 9/11. The Islamic State group claimed slain shooter Omar Mateen was acting as "one of the soldiers of the caliphate in America" when he attacked the Pulse club in the Florida resort city, an assault that ended when police stormed the venue. "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," FBI chief James Comey said, adding that investigators were looking into the possible role of anti-gay bigotry.
