Summary The HH-60 rescue helicopter was on an unspecified training mission when it crashed at Camp Hansen.
TOKYO (AP) - Japan has asked the U.S. military not to fly its HH-60 helicopters until it determines what caused one to crash Monday at a U.S. base on the southern island of Okinawa.
Defense Minister Itsunori Onodera said Tuesday that he had conveyed the request to the U.S. military.
Information about the crash has been unclear.
On Monday, Onodera said that all four crew members aboard the crashed HH-60 were thought to have survived and one had been taken to the hospital.
A U.S. Air Force statement later said the fourth crew member was missing.
The HH-60 rescue helicopter, which belongs to Okinawa's Kadena Air Base, was on an unspecified training mission when it crashed at Camp Hansen.
Japan asked for a prompt investigation and preventive measures to avoid future accidents.
