The pilot killed in the North Sea plane crash trained at Vance Air Force Base, the base said on its Facebook page.

1st Lt. Kenneth "Kage" Allen died during a training mission Monday over the North Sea near the United Kingdom.

Vance Air Force Base wrote the following message on Facebook:

"1st Lt. Kenneth “Kage” Allen, a Vance Air Force Base graduate class 19-01, tragically lost his life yesterday during a training mission over the North Sea. To Kage’s family and Wingmen, we grieve with you during these troubling times. Kage, we will always remember you. #VanceProud"

Allen was flying a U.S. Air Force F-15C Eagle when it crashed. The aircraft was from the 48th Fighter Wing, RAF Lakenheath, United Kingdom.