Vladimir Putin's flagship is said to have suffered crippling damage in the Black Sea from Ukrainian-made missiles inspired by Russian anti-cruise missiles.
The Kremlin claims the Moskva missile cruiser was seriously damaged after ammunition on board the ship blew up but Ukraine says it was struck by two Neptune missiles.
The Neptune missiles were created by Ukrainian developer Luch Design Bureau and are said to be a modernised version of the Russian Kh-35 anti-cruise missile.