Ukraine says it sank a Russian warship off Crimea in much-needed victory amid front line losses

Ukraine's military intelligence service said Tuesday that a special operations unit from the war-torn country had managed to sink another Russian warship. The intel agency released a statement early Tuesday morning saying the Russian patrol ship Sergey Kotov was destroyed near the Kerch Strait, off the coast of Russian-occupied Crimea.

It said the ship was sunk in an overnight operation carried out by the "Group 13" special forces unit using Ukrainian-made Magura V5 maritime drones. It estimated the loss to Russia's navy of being in the region of $65 million.

A video posted on social media by Ukraine's military intelligence agency showed what it said was the drone attack on the Russian vessel.