A U.S. Military HH60 helicopter has crashed during a training mission on the U.S. Marine base in Okinawa, Japan.
NTV is reporting that three of the four personnel on board survived, and one is still missing.
Two other helicopters circled the crash site where smoke rose in a mountainous area.
There were no casualties or damages outside the base.
Over the weekend, the Marine Corps deployed 12 additional Osprey aircraft to the base.