SAN FRANCISCO (AP) — Rescuers have called off a search for two teenage boys who were swept out to sea while playing in the surf at San Francisco's Ocean Beach.

The San Francisco Chronicle reports the boys, both 17 years old, were presumed drowned Saturday after rescue teams from the Coast Guard and the San Francisco Fire Department failed to find them during a nearly five-hour search.

Fire Department spokesman Jonathan Baxter said no recovery effort will continue Sunday. He said the boys' families understood what likely happened to them.

The boys had run into the surf with three other friends when they were pulled by a strong wave. Their friends made it back to shore and were taken to the hospital in stable condition.