A 38-year-old man was smoking a cigarette in South of Market early Wednesday morning when someone struck him in the face with a wooden cane, police said.
The man was knocked unconscious for about 30 seconds while the unknown assailant went through his pockets on Folsom Street near Fifth Street around 2:30 a.m.
He was taken to a local hospital in non-life threatening condition with facial trauma and a laceration near his eye.
The attacker, a man, got away with cash before officers arrived. Police do not have a detailed description of the suspect.