NORCO, Calif. (AP) — A man who allegedly made Facebook threats to attack a Southern California community college has been charged with conspiracy to commit murder after authorities found an AR-15 in his home — the same kind of rifle that was used in the Florida school shooting.

Twenty-seven-year-old Jacob McBain of Norco was arrested Monday after police were told that McBain posted threats to shoot people at Norco College.

The Riverside County Sheriff's Department says a search of his home turned up a loaded AR-15 and two loaded handguns.

Investigators also found more than 500 rounds of ammunition, according to court records filed Thursday and cited by the Desert Sun of Palm Springs.

The records also alleged that McBain had at least one accomplice who hasn't been identified.