This was announced by the adviser to the Ukrainian President's Office Oleksiy Arestovych at a briefing. The Russian military ship was fired upon by the Armed Forces of Ukraine.
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"A large landing ship carrying about 400 infantrymen, 20 tanks, and 45 armored personnel carriers suddenly exploded in the Berdyansk port," Arestovych said.
As it turned out, the captains of the destroyed ship betrayed Ukraine in 2014 and sided with the Russian invaders.
The Ukrainian Armed Forces destroyed the Russian ship Orsk in Berdyansk: watch the video