Marine sea tank sinks 70 miles off San Diego coast with 16 aboard, 1 dead and 8 missing

(FILES) In this file photo taken on February 19, 2014 AAV-7 Amphibious Assault Vehicles with 3rd Assault Amphibian Battalion, land with US Marines from 1st Battalion, 1st Marine Regiment, during the US -JAPAN military exercise Iron Fist 2014 outside

A seafaring tank with 15 Marines and a Navy sailor aboard sank near a military-owned island off the coast of Southern California, leaving one of the Marines dead and eight missing, authorities said Friday.

They were traveling in the amphibious assault vehicle from the shores of San Clemente Island to a Navy ship Thursday evening when they reported that the vehicle was taking on water, said Lt. Cameron H. Edinburgh, a Marine Corps spokesman for Camp Pendleton.

Two of the Marines who were rescued were injured, with one hospitalized in critical condition and the other in stable condition, a Marine Corps statement said.

Military ships and helicopters on Friday were searching choppy seas for the missing amid moderate to strong winds. The Navy-owned island is about 70 miles offshore from San Diego.

All of the Marines involved were assigned to the 15th Marine Expeditionary Unit and were involved in a routine military exercise when the vehicle started taking on water, the Marine Corps said.

“We are deeply saddened by this tragic incident. I ask that you keep our Marines, Sailors, and their families in your prayers as we continue our search,” Col. Christopher Bronzi, the unit's commanding officer, said in a statement from the Marine Corps.

The Marine Expeditionary Force is the Marine Corps’ main warfighting organization. There are three such groups which are made up of ground, air and logistics forces.