21 December 2025

Ukraine strikes Russian Kilo-class submarine docked in port

Stavros Atlamazoglou

The Ukrainian military and security services pulled out another impressive feat by destroying a Russian Kilo-class submarine on Monday.

Using underwater drones, the Ukrainian forces landed hits on the Russian attack submarine while it was in the Novorossiysk port.

In a video released by the Ukrainian security services, naval drones can be seen rushing up the docked submarine without any opposition. A large blast ensues after contact is made with the Russian vessel.

The Ukrainian Security Service (SBU) claimed that the Russian submarine suffered “critical damage” as a result of the attack and was “put out of action.” However, it might be some time before a proper post-attack assessment reveals the extent of the damage. SBU identified the Russian submarine as the Kilo-class Varshavyanka, which presumably costs $400 million.

The Ukrainian forces very likely targeted the Russian submarine because of its participation in Russia’s long-range fires campaign against Ukraine. The vessel was allegedly carrying Kalibr cruise missiles, which Moscow has used in conjunction with suicide drones and air-launched ballistic and cruise missiles to target Ukraine’s critical infrastructure and energy grid.

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