Amphibious assault vehicle sinks in Calif.

OCEANSIDE, Calif. -- A Marine trapped inside a sunken amphibious assault vehicle for two hours Friday at the bottom of Oceanside Harbor was airlifted out, NBC station KNSD reported.

His condition was not revealed.

According to a spokesperson with the 15th Marine Expeditionary Unit, search and rescue crews pumped oxygen into the vehicle to increase the chances of the Marine's survival.

The Marine was one of six in a training crew inside the vehicle when it flipped or capsized about noon (3 p.m. ET) at the Del Mar Boat Basin at Camp Pendleton, officials said.

Five were pulled out earlier and three of them were rushed to hospitals. Their conditions were not reported.

Marines routinely train in amphibious assault vehicles at the Del Mar facility, officials said. Each vehicle usually is occupied by a crew of three plus an instructor.

For further updates, see the story at msnbc.com.