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).
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.
Source: Militarnyi
