Rescuers were unable to revive a woman who passed out while diving off the coast of San Pedro, authorities said Sunday.
The woman had been diving with a partner, who saw that she was unresponsive while she was underwater, said U.S. Coast Guard Petty Officer Mark Barney.
The Coast Guard was alerted of the incident at 10:22 a.m. Saturday and sent a 45-foot boat to a spot about 6½ miles south of San Pedro.
After the Coast Guard tried to revive the woman with CPR, the Los Angeles County Fire Department took her to a hyperbaric chamber on Santa Catalina Island, Barney said.
The diver was pronounced dead about 12:30 p.m. Saturday, said Anthony Lopez, an investigator with the Los Angeles County coroner's office. Her name has not been released.