CAMP PENDLETON -- One person has died and three others are missing after a Navy helicopter crashed off the coast of Camp Pendleton Friday afternoon during training. Military search teams are looking for more survivors, a military spokesman said Friday evening.

The MH60S Seahawk chopper crashed about 2:30 p.m. 50 miles offshore near San Clemente Island while training near the USS Bonhomme Richard, according to a statement from the Navy. MH-60S helicopters are designed to carry at least 20 troops.

No other aircraft were involved.

The Navy helicopter was attached to the Helicopter Sea Combat Squadron 23 and was doing routing training in support of Expeditionary Strike Group 5, Amphibious Squadron 7 and the 13th Marine Expeditionary Unit at the time of the crash.

One U.S. Navy Sailor was rescued from the downed aircraft and taken by another MH-60S helicopter to the USS Bonhomme Richard but he later died.

Search and rescue crews are looking for the other three crew members in inflatable boats and using nearby aircraft including search and rescue helicopters. The U.S. Coast Guard is also assisting.

The names of the two U.S. Navy pilots and two crew members are being withheld pending notification of family. The crash is under investigation.

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