A Russian sub took 'catastrophic' damage from a Ukrainian missile strike despite attempts to downplay it, UK intel says

A key Russian submarine suffered "catastrophic" damage in a recent Ukrainian attack, UK intel said.

The loss of the submarine is significant, as it's one of four cruise-missile-capable subs in Russia 's Black Sea Fleet .

It could take " many years " before the submarine can return to service, the UK 's Ministry of Defence said.