Another Russian military aircraft has fallen from the sky in a fiery wreck, social media video widely circulating on Friday shows. But precisely how it happened is being hotly disputed.

Ukraine is now touting that for the first time ever, its forces have downed a Russian long-range bomber which was actively engaged in attacks on Ukrainian cities. “For the first time, anti-aircraft missile units of the air force in cooperation with the defense intelligence of Ukraine destroyed a Tu-22M3 long-range strategic bomber,” Ukraine’s military announced.