A search for a 14-year-old boy lost in the water at Ocean Beach on Wednesday was suspended for the night, although some rescue crew members remained on the scene to keep watch, a fire official said Wednesday evening.
The boy was swimming with an adult and another juvenile who were rescued from the water earlier Wednesday afternoon, according to a Coast Guard official.
The father was taken to a local hospital, where his condition was not immediately known.
Tony Barbero, a 17-year-old surfer, was at the scene and told KPIX-TV that he saw two people struggling in the water and that he was able to pull both of them to the beach.
A teenage boy was the first person he saw struggling, Barbero said.
"I couldn't see what was happening at first, but later I figured he was starting to drown. So I took him on my board and paddled him in," he told the station.
Afterward, he noticed a man who appeared to be in his 30s also struggling in the water. "I didn't think that he was struggling until I had the other guy onto the shore," Barbero said.
Once onshore, rescuers were able to provide medical attention to the man, whose pulsed had stopped, San Francisco Battalion Chief Marty Ross said.
KNTV-TV reports that the boy Barbero pulled from the water is the older man's nephew. The boy who is still missing is the man's son.
Ocean Beach, on the western shore of San Francisco, is known for being one of the nation's most dangerous.