Some officers of the Nigerian Air Force (NAF) are now feared dead after a plane crash.
The incident was said to have occurred in Kaduna State, Northwest Nigeria.
Sources say the crash happened on Monday afternoon while the officers were undergoing an air drill.
Though details of the incident are still sketchy, reports say the training aircraft had two pilots on board.
The source, who pleaded not to be named, said ambulances were seen driving toward the crash site.
The Command Public Relations Officer, Air Training Command (ATC), Kaduna Group Captain Bukar, has said the NAF Headquarters would issue a statement on the crash.