San Francisco, California (CNN) -- Traffic was halted on the San Francisco-Oakland Bay Bridge on Thursday after a man threatened to blow up the bridge, California Highway Patrol spokesman Trent Cross said. No explosives were found, Cross said.
The bridge's west-bound upper deck was closed for about an hour, snarling traffic on a span that carries 280,000 vehicles a day, the Metropolitan Transportation Commission said.
Traffic was allowed to return to the bridge at 8:15 a.m. (11:15 a.m. EDT).
Aerial video from CNN affiliate KGO showed police handcuffing a man.