Ukrainian Special Forces Strike Russian Missile Ship in Karelia’s Internal Waters

On the night of October 4, 2025, the Ukrainian Special Operations Forces targeted the Russian Project 21631 Buyan-M Grad small missile ship (hull number 575).

The operation took place at 4:31 a.m. in the waters of Lake Onega, located within the territory of the Republic of Karelia.

Preliminary reports indicate that the strike hit the right side of the ship’s power plant compartment.

As a result of the attack, the vessel sustained critical damage, significantly limiting its maneuverability and combat effectiveness.

The ship was en route from the Baltic Sea to the Caspian Sea, likely to reinforce the Russian fleet’s grouping in the southern region. Its route passed through Russia’s internal waters.

Grad is among the newest ships of the Buyan-M class, having been commissioned into the Russian Baltic Fleet on December 29, 2022.

We also have an article detailing the number of damaged Buyan-M vessels, their total quantity, and the extent to which they are being deployed against Ukraine.