San Francisco fire rescue crews responded to reports of two people in distress Monday evening at Baker Beach, according to tweets from the department.
About 7:30 p.m., fire officials said one person had been rescued with non-life-threatening injuries and a second victim was in the water, unconscious and not breathing and that an active rescue was in progress.
Fire officials said the victim pulled from the water was a 22-year-old male who was trying to help a male victim still in the water.
The Coast Guard continued searching for the second victim until about 11 p.m. Monday, when they decided to call it off.
No further details were available.