( CNN ) -- Two sailors were killed and a third injured during a training exercise at California 's Camp Pendleton on Monday morning , according to a spokesman . The accident occurred at 8 a.m. when the 7-ton bulk water tanker the sailors were driving rolled over , said Cmdr . Greg Hicks , a U.S. Navy 3rd Fleet spokesman . Hicks said the names of the victims are being withheld until their families can be notified . Meanwhile , the injured sailor was taken to a nearby hospital where he is listed in stable condition , Hicks said . The U.S. Marine Corps will conduct the investigation because it happened on their base , he said . A Marine Corps instructor was killed during a January 14 training exercise at Camp Pendleton when the amphibious assault vehicle he was riding in capsized and sank .
Vehicle rolls over during a training exercise at California 's Camp Pendleton . Marine Corps will investigate because accident happened on its base . In January , a Marine Corps instructor died when his assault vehicle sank .