The attack was conducted by Ukraine's security service and navy, the Reuters news agency reported, citing a Ukrainian intelligence source.
"As a result of the attack, the Olenegorsky Gornyak received a serious breach and currently cannot conduct its combat missions," the source said, as quoted by Reuters.
According to Russia's defence ministry, Ukrainian sea drones attacked a Russian navy base near the Black Sea port of Novorossiysk early on Friday but were destroyed by Russian warships, Reuters reported.
Russia invaded Ukraine on February 24, 2022, launching the largest military campaign in Europe since World War II.
Friday is day 527 of Russia’s war on Ukraine.
(gs)
Source: IAR, PAP, Reuters