SAN FRANCISCO (AP) — A San Francisco police officer is in critical condition after he was run down by an SUV while on bicycle patrol.

Police say shortly before 12:30 p.m. Wednesday, officers from the Tenderloin Station investigating a possible gun violation spotted a man they thought have a weapon.

The man was in a Lexus SUV and drove off. Police say about three blocks from City Hall, the SUV hit the bike officer and kept going.

The driver was arrested about three hours later. His name hasn't been released.

The officer underwent surgery and is in intensive care.