The crash occurred around 5 p.m. Sunday on Las Pulgas Road. All of the vehicles involved were privately owned vehicles and the Marines were all off-duty at the time, said Capt. Cameron Edinburgh, a 1st Marine Division spokesman.
One injured Marine was airlifted to Scripps Memorial Hospital and is being treated for his injuries, the statement said. The third Marine was treated and released from Naval Hospital Camp Pendleton.
The name of the Marine who was killed is being withheld until 24 hours after notification of next-of-kin. Edinburgh declined to say to which unit the Marine was attached but said it was a 1st Marine Division command.
The accident is under investigation.
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