Ukrainian forces rained fire on the Russian warship Moskva on Wednesday, severely damaging the vessel after securing a hit, Odessa governor Maksym Marchenko said in a social media post. Moskva reportedly faced missile strikes in the Black Sea.

“Glory to Ukraine!”, governor Marchenko wrote on Telegram. He added, “Neptune missiles guarding the Black Sea caused very serious damage to the Russian ship”, AFP reported.

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While Moscow has so far not confirmed any such attack, Ukrainian officials have been celebrating the “surprise” strike. Oleksiy Arestovych, the advisor to the Ukrainian President, said in a video that the Russian vessel currently “burns strongly.”

Russian warship Moskva made headlines earlier this after its encounter with Ukrainian forces on Snake Island, where the crew was asked to “f*#k off” after demanding a surrender.

“With this stormy sea, it is unknown whether they will be able to receive help,” Arestovych said while adding that there were more than 500 crew members on the Russian warship, AFP reported.

The news comes a day after Russia’s defence ministry announced that more than 1,000 members of the Ukrainian armed forces had surrendered in the strategic port city of Mariupol, which has been under siege for more than one month.

“In the city of Mariupol… 1,026 Ukrainian servicemen of the 36th Marine Brigade voluntarily laid down their arms and surrendered”, the Russian defence ministry said, according to reports from AFP.

Ukrainian authorities, however, refuted the claims made by Moscow and said that there were no official reports of such a surrender.

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Vadym Denysenko, the advisor to Ukraine’s Interior Minister, denied the claim in comments to the Current Time TV channel, saying that they haven’t heard anything like that and the battle over the seaport is ongoing, according to reports from Associated Press.

“According to official data of (Ukraine’s) Defense Ministry and the General Staff, we haven’t heard anything like that,” Denysenko said. “Moreover, I will say … that the battle over the seaport is still ongoing today.”