An US aircraft which crashed in Cambridgeshire was one of six heading to California.
The US FA-18 Hornet came down in a field near to RAF Lakenheath.
The aircraft belonged to Marine Attack Fighter Squadron 232 stationed at Marine Corps Air Station Miramar.
The Marine Corps officially confirmed the death of the pilot, but it is unknown at this time if the pilot ejected from the single-seat aircraft.
A statement from the US Airforce said: "The aircraft was transiting from Bahrain to Miramar in a flight of six aircraft when it crashed approximately six miles northwest of the airfield.
"The remaining five F/A-18C's safely diverted to RAF Lossiemouth. The United Kingdom Coast Guard is currently on the scene of the crash site and is in close coordination with U.S. military officials.
"Our deepest condolences go out to the family and friends of the pilot. The cause of the crash is still unknown."