UAV event in Krasnodar, Novorossiysk area, Russian Federation on Mon 15th December 2025

Around 15 December 2025 (as reported), Ukrainian Sub Sea Baby underwater drones struck a Russian Class 636.3 Warshavyanka 'Improved Kilo' submarine that was stationed at the naval base in Novorossiysk, Krasnodar. Ukrainian Intelligence officials stated that the sub sustained critical damages and 'was essentially incapacitated'. Russian Navy officials acknowledged the 'attempt to strike', but denied that the vessel sustained any damages. The submarine is equipped with cruise missile launchers that are commonly used to attack Ukraine. Some Russian social media groups made unsubstantiated claims that 14 sailors (including 9 conscripts) might have died as a result of the strike. Coded as 0 fatalities, due to inability to confirm those claims.