The Danish military says an air force F-16 fighter jet crashed in the North Sea off western Denmark, AP reported. The military says the pilot ejected safely under "controlled circumstances" and was picked up at sea by a helicopter. The civilian Accident Investigation Board said Wednesday it is investigating the cause of Tuesday's crash off the island of Fanoe. The jet fighter was on a training flight when the pilot reported technical troubles. The pilot then emptied the jet fighter's fuel tanks over the North Sea before ejecting.