Ukraine Hits Unique Russian Air Defense Arsenal Near Moscow—Buk and S-300 Systems Stored and Repaired There

Ukrainian strike drones hit Russia’s 75th Arsenal in Serpukhov, Moscow region, sparking a fire at a defense facility specializing in the repair, restoration, and storage of air-defense systems, according to the Exilenova+ OSINT community on October 22.

The facility’s main role includes servicing Buk-family systems and S-300 air-defense equipment. Rostec  previously said the site repaired hardware from the Buk-M1, Buk-M2, and S-300V systems.

Russian authorities issued a drone warning for the region at 9:21 pm on October 21, which remained in effect until 4:12 am the following morning. A missile warning was also reported in Serpukhov during the strike.

Footage and reports analyzed by Exilenova+ indicated that a fire broke out on the grounds of the arsenal after the strike.

The 75th Arsenal has been directly involved in supporting Russian military equipment used in the war against Ukraine.

In November 2022, Rostec said nine production workshops at the facility were engaged in repairing military hardware for Russian forces.

OSINT researchers had also previously highlighted the site because of its unusual role in Russia’s air-defense infrastructure.

In a March 2024 assessment, researcher Jompy described the 75th Arsenal as the only identified Russian storage base specifically associated with air-defense systems.

That makes the Serpukhov facility more than a conventional repair plant. It serves as a site where Russian air-defense equipment can be stored, restored, and returned to service, including systems used to protect military and strategic targets from Ukrainian missiles and drones.

Earlier, ATESH partisan movement sabotaged a critical electrical substation in Azov, Russia’s Rostov region, disrupting the power supply to a defense manufacturing facility involved in producing guidance systems and other components for Russian missiles.

Help us understand what you already know

Join United24 audience survey