Police say that the woman, who was described by witnesses as being in her early 40s, was last spotted at the intersection of Larkin and McAllister Streets, at the northeast corner of the Asian Art Museum.
According to the San Francisco Police Department, that's also where her victim, a 44-year-old man, was standing at 11:15 a.m. Sunday, when the attack occurred.
Police say that the woman ran up to the man, struck him with a stick, then fled in an unknown direction. He was left with injuries police say are not life-threatening, but were serious enough that he was transported to a local hospital for treatment.
Both her stick and she remain free to roam San Francisco's streets as of publication time, police say, as no arrests have been made in the case.