TWENTYNINE PALMS, Calif. (AP) _ A helicopter on combat maneuvers crashed Friday near the Twentynine Palms Marine Corps Training Center, killing four Marines and injuring one, military officials said.

The identities of the Marines were withheld pending notification of relatives, said Chief Warrant Officer Ron Fraizer.

The CH-53E helicopter with five Marines aboard crashed Friday morning about 12 miles northwest of the main base, officials said. The surviving Marine was taken to the base hospital and treated for minor burns, Fraizer said.

A cause of the crash has not been determined and the accident is under investigation, he said.

The CH-53E, known as the Super Stallion, is the newest helicopter built by the Sikorsky Aircraft division of United Technologies Corp. in Hartford, Conn.

CH-53E models, upgraded versions of the A through D Sea Stallion helicopters, have three engines rather than the standard two engines and were designed to transport equipment into combat.