A US air force F-15 fighter jet has crashed into the Pacific off the southern Japanese island of Okinawa after the aircraft developed problems in flight.

Two of America’s most advanced fighter jets, the F-22 Raptor, have arrived in Japan for their first overseas deployment, the US Air Force said today.

Japanese police were to continue questioning an American Air Force sergeant who is under suspicion in the alleged rape of a woman in Okinawa.