The BBC reports:
"Western officials say Ukrainian claims to have hit the Russian cruiser, the Moskva, with their own domestically developed Neptune missile are “credible.”
One official said the loss of the Moskva, if confirmed, was a “massive blow” to Russian military credibility, regardless of how it happened.
He said he was not aware of another case, involving a capital ship, in which a fire had led to the explosion of the ammunition magazine - something Russia has claimed. This, the official said, would represent “remarkably inept” control by crew - and it was hard to believe that this was how the incident occurred.
The official added that the loss of the Moskva would have “a significant impact" on Russian maritime operations.
As flagship of Russia’s Black Sea fleet, the Moskva was providing vital command and control functions for the rest of the fleet. This would now be harder – but not impossible – for Russia to achieve.
But if this is proven to have been a successful Ukrainian strike, he said it suggested the fleet’s air defences were vulnerable.
On recent Russian attacks on Ukrainian fuel and ammunition depots, the official said these were evidence of an effort to limit the resupply and manoeuverability of Ukrainian forces.
But he did not believe the strikes had reached a level where they would have an immediate effect.
On Russian casualties, he said the Western count was "somewhat lower" than Ukraine’s figure (currently 19,700 Russian dead), but that “incredible numbers" had been killed.
The official said Russia’s air force was still not able to operate beyond the forward line of Russian troops, because it was "terrified" of flying over Ukrainian-held positions. This was due to a combination of Ukrainian air defence systems and systems provided by the West.
Officials said torrential rain in eastern Ukraine was also having an effect, making it harder for Russian forces to operate off road, and slowing down their ability to mass troops."