Man holds out atop roof of San Diego FBI building

SAN DIEGO (AP) — Authorities say a man hopped a security fence and is now refusing to come down from the rooftop of a building at San Diego's FBI headquarters office.

FBI spokesman Darrell Foxworth says the man was alone when he arrived at FBI headquarters and climbed over a corrugated-steel security gate at about 11:30 a.m. Sunday.

The man failed to get into the main building through the front entrance, and police were called.

He entered and walked to the top of the parking structure then made his way to the roof of an annex building where he remained some five hours later.

FBI hostage negotiators and SWAT team along with San Diego police and firefighters are at the scene.

It's not clear whether the man was armed or what he was seeking.