KYIV—Ukraine’s Special Forces said on Monday that Admiral Viktor Sokolov, the commander of Russia’s Black Sea Fleet, had been killed in a Ukrainian attack last week on the fleet headquarters in the Crimean port of Sevastopol.
The Russian Defense Ministry did not immediately respond when asked by Reuters to confirm or deny that Mr. Sokolov had been killed in the attack on Crimea, which Russia seized and annexed in 2014.