At about 10:30 p.m. Sunday, a concert was letting out of the Regency Center at 1290 Sutter Street when a fistfight started, police Sgt. Lyn Tomioka said.
The fight escalated and somebody began shooting. Nine people were hit in their lower extremities, Tomioka said.
The victims were taken to various hospitals in the area, and none of their injuries appeared to be life threatening.
No suspects in the shooting have been arrested, Tomioka said.