Chinese automaker BYD is expanding its presence around the world, but there's one place its vehicles will no longer be welcome.

The U.S. military has announced a ban on BYD vehicles entering one of its most important air bases in Japan.

Officials say the Chinese vehicles pose a security risk, although they haven't publicly identified a specific threat.

The ban applies to all BYD vehicles attempting to enter the base, including privately owned cars, taxis, delivery vehicles, and those operated by contractors.

U.S. Military Cites Security Concerns "These vehicles present an unacceptable and unmitigable risk to our personnel and our mission," Kadena Air Base spokesperson Lieutenant Colonel Alli Stormer told Reuters.