 It was likely downed on takeoff or landing at Abu al-Duhur Military Airbase, under siege by rebels, by heavy machine gun fire.A few days later a second MiG-21, registered 2280, was shot down and recorded on video on 4 September 2012.It was likely downed on takeoff or landing at Abu Dhuhur air base, under siege by rebels, by KPV 14.5 mm machine gun fire.