Las Vegas gunman Stephen Paddock bought more than 30 weapons and had more than a dozen stashed in his hotel room as he carried out the deadliest mass shooting in U.S. history, Fox News learned Monday. The deadly cache included converted, fully automatic AR-15 style assault rifles with high capacity magazines, according to a law enforcement source. The weaponry suggests Paddock passed numerous FBI background checks. The source said police found between 11 and 15 guns in his hotel room.

Weapons found were both .308 and .223 caliber, Fox News has learned. Country music star Jason Aldean was on stage Sunday night at the Route 91 Harvest Festival when Paddock opened fire across the street from inside the Mandalay Bay Hotel and Casino, killing at least 58 people and injuring more than 500. Paddock killed himself as police stormed his hotel room. One witness told a local television station that he heard “hundreds of shots.” The gunfire was rapid and reportedly confused with firecrackers. READ MORE