For the first time, General Parviz Jafari, one of the Iranian Air Force pilots who actually flew the chase mission, describes one of the most credible
of all UFO encounters, the famous sighting of a UFO in Iran on 19 September 1976, known as “Teheran Dogfight.”
The last link includes the evaluation report. I did speak to some one who has first hand knowledge of this event, apparently there is a lot more to
this incident and more official files do exist.