A Russian MiG-31 was lost on Apr. 26, 2017. At that time, the Russian Ministry of Defense did not explain why the aircraft crashed. It has now emerged that the twin-engine fighter was brought down by another MiG-31 which fired a R-33 air-to-air missile mistakenly.
By Konstantin Tyurpeko (http://russianplanes.net/id161326) [CC BY-SA 4.0 or CC BY-SA 4.0], via Wikimedia Commons
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