Six Marines are in critical condition and another six are in serious condition after their amphibious-assault vehicle caught fire Wednesday morning while training at Camp Pendleton, the Marine Corps said.

Fifteen Marines assigned to the 1st Marine Division at the southern California base were injured in the incident, and eight of those were evacuated to the burn center at University of California San Diego Health, a 1st Marine Division statement said. Of those eight, three are listed as critical and five as serious.

Four Marines were sent to the University of California Irvine Medical Center, the statement said. Three of those are critical and the other is in serious condition.

U.S. Marine Corps photo
An Assault Amphibious Vehicle belonging to India Company, Battalion Landing Team, 3rd Battalion, 5th Marines, sits surfside at Freshwater Beach during water recovery training as part of Exercise Talisman Saber 17, Shoalwater Bay Training Area, Queensland, Australia, July 22, 2017.

One Marine has been taken to Scripps Memorial Hospital La Jolla and is in stable condition, the statement added. Two Marines are being treated at Naval Hospital Camp Pendleton with minor injuries.

It was not immediately clear what caused the fire, which happened on land, but authorities were investigating, said 1st Lt. Paul Gainey, a division spokesman. The Marines were conducting a combat readiness evaluation as part of scheduled battalion training when the incident happened about 9:33 a.m. local time.

“Our thoughts and prayers are with the Marines and their families as they receive medical care,” Gainey said.

An amphibious-assault vehicle, or AAV-7, is a 30-ton, armored vehicle designed to carry Marines and their equipment from Navy amphibious-assault ships onto land and into combat. The tracked vehicles, known to Marines as “amtracks,” feature a large boat hull-shaped front end that helps them maneuver through water. They can carry up to 28 Marines at a time.

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