Three adults are lost and trapped on a cliff at San Francisco's Baker Beach and a search and rescue operation is in progress, fire officials said Friday afternoon.

The three are using cell phones to communicate with 911 dispatchers, the fire department reported on social media around 1:30 p.m. The rescue effort includes watercraft, fire officials said.

The three are somewhere between Cliff House and Baker Beach, and the public is asked to avoid the area as the search and rescue continues, according to fire officials. They are not injured, fire officials said.