A US military helicopter has crashed into the sea off the coast of the southern island of Okinawa with two crew members missing, said Japanese officials.
According to the BBC, three crew members have been reportedly rescued.
The cause of the crash is not yet known, Japan's defence ministry said, adding that the crash happened near Camp Schwab, the US Army base on the east coast of the island.
Okinawa is home to several US bases and around 27,000 personnel.
The deployment is part of the US-Japan post-war defence alliance.
