Remember the ship that sank in Maripol a week or two ago? I think I posted a video earlier where it was assessed that an ammo handling accident caused the ship to blow up, not a Ukrainian missile. It wouldn't surprise me if the Russian account of an ammo explosion due to a fire was true. The Ukrainians may be the good guys here, but let's be honest: they have an impressive IO campaign. Info coming from the Ukrainians should be treated with skepticism. Maybe it was a missile, maybe it was bad Soviet seamanship. *shrug
(The Moskva is the old Soviet Slava, one of their guided missile cruisers that caused NATO some sleepless nights due to her anti-ship capabilities. That class of ship would travel with the Kirov battlecruisers or anchor their own Surface Action Group. Soviet naval doctrine placed a massive value on long range missiles for both surface and aviation units, all to counter US carriers. Given the modern state of the Soviet navy, losing the Moskva is kind of a big deal.)