Crews on Monday were searching for a 12-year-old boy who was swept into the water at Cowell Ranch State Beach in San Mateo County, officials said.
Two other people, an adult and an 8-year-old, were with the boy standing on the beach when they were all swept into the ocean by a wave, according to officials. The adult and the 8-year-old were eventually pushed back to the shore by the surf.
The 12-year-old, who is from Fremont, was pulled under about 100 yards offshore, officials said.
The search effort was slated to continue through the evening.
Get Philly local news, weather forecasts, sports and entertainment stories to your inbox. Sign up for NBC Philadelphia newsletters.
A high surf advisory was in effect along the Bay Area coastline until 6 p.m. Monday, according to the National Weather Service.
Further information was not immediately available.
This is a developing story. Details may change as more information becomes available.