One of the Russian Navy's most important warships has sunk in the Black Sea, a massive blow to a military struggling against Ukrainian resistance 50 days into Vladimir Putin's invasion of his neighbor.br br Russian state news agency TASS reported Thursday evening that the guided-missile cruiser Moskva had sunk, citing a statement from the Russian Ministry of Defense.br "During the towing of the cruiser Moskva to the port of destination, the ship lost its stability due to hull damage received during a fire from the detonation of ammunition. In the conditions of stormy seas, the ship sank," the statement said, according to TASS.br Conflicting accounts have emerged about the incident.