Originally published January 14, 2011 at 2:51 p.m., updated January 14, 2011 at 3:57 p.m.
A U.S. Marine died today when the amphibious-assault vessel he was training aboard capsized and sank off the coast of Camp Pendleton, authorities reported.
Five other crew members on the craft were not injured in the late-morning accident, which prompted an urgent military-civilian rescue effort in the USMC station's Del Mar Boat Basin, just north of Oceanside Harbor.
Lifeguards and a dive team were among the civilian crews aiding military personnel in the emergency.
The body of the deceased Marine was recovered about 2:15 p.m., according to Marine Corps officials. His name was withheld pending notification of his family.
Military investigators were working to determine the cause of the accident.