A man found unconscious at Kehena Beach in Pahoa on Saturday has died.

Big Island firefighters responded to a report of a drowning and arrived at the black-sand beach around 5 p.m. to find beachgoers performing CPR on the man by the water’s edge at the bottom of the cliffs, according to the Hawaii County Fire Department.

Six firefighters continued CPR on the man for 30 minutes before taking him up a rocky pathway and transporting him to Hilo Medical Center, where he later died.

The cause of the man’s death has not been determined, according to firefighters.