A military fighter jet crashed in Arizona on Wednesday during a night-time training mission, military officials said, according to Reuters. The F-16 Fighting Falcon went down around 8 p.m. local time five miles (eight kilometres) from Douglas Municipal Airport in the city of Douglas on the U.S.-Mexico border, the 162nd Wing Arizona Air National Guard said. It was not immediately clear what caused the crash or whether the pilot, who was alone on board, managed to eject safely, it said. Officials with the Cochise County Sheriff's Office told local broadcaster KOLD-TV that several homes had to be evacuated because of a large fire caused by the crash.