At least one Marine is dead and eight are missing after a training incident off the Southern California coast. Marine officials say two others are injured after what they called a “mishap” involving an amphibious assault vehicle near San Clemente Island Thursday night. The officials say it happened during a training exercise for members of the 15th Marine Expeditionary Unit.

15 Marines were inside the vehicle during the time of the incident. One died and eight are still missing, according to a press release from the 15th MEU.https://t.co/dr6umJ2H31 pic.twitter.com/biEjqclgtC

— Marine Corps Times (@Marinetimes) July 31, 2020

A tweet from the One Marine Expeditionary Force says search and rescue efforts are underway, with support from the Navy and the Coast Guard. 15 Marines were inside the vehicle during the time of the incident, eight of whom are still missing, according to a press release from the 15th MEU. Two other Marines are listed as in “critical condition” at a nearby hospital, the press release said. Around 5:45 p.m. Marines in the AAV reported taking on water while participating in a training exercise near San Clemente Island, California. Search and rescue operations are underway with assistance from multiple Navy and Coast Guard ships and aircraft, the press release said. The name of the deceased Marine is being held for 24 hours while the family can be notified, the release said.