Three wounded by weekend gunfire in S.F.

Three people were injured after being hit by gunfire Saturday evening and early Sunday morning in San Francisco, police said.

One victim walked into a city hospital after being shot between 2 and 3 a.m. and was rushed to San Francisco General Hospital with undisclosed injuries, said police spokeswoman Officer Grace Gatpandan.

Investigators did not know where the shooting happened because the victim, who was not named, would not cooperate with authorities, police said.

The shooting came after two people were wounded in separate shootings in the city’s Visitacion Valley neighborhood the previous evening.

Around 7:30 p.m., a juvenile male was shot at Sunnydale Avenue and Santos Street. The extent of his injuries was not immediately known.

Around an hour earlier, a victim, who was not identified, was shot at Heritage Avenue and Scherwin Street. That person was taken to San Francisco General Hospital with undisclosed injuries.

No arrests have been made in any of the shootings. Authorities did not immediatley say if they thought the attacks were related.

Evan Sernoffsky is a San Francisco Chronicle staff writer. E-mail: esernoffsky@sfchronicle.com Twitter: @EvanSernoffsky