Ukrainian drones struck a critical military-linked facility in Russia’s Moscow Oblast that produces thermobaric warheads for Shahed drones, the Ukrainian General Staff reported on 4 July. The strike ignited a fire and caused visible black smoke, while Russian local authorities acknowledged drone-related damage in the area.

Ukrainian drones target war-linked facility

According to the General Staff of the Armed Forces of Ukraine, units from the Unmanned Systems Forces, together with other Defense Forces, hit the JSC “Scientific Research Institute of Applied Chemistry” in Sergiev Posad, Moscow Oblast.

The report emphasized that the facility is currently involved in the production of thermobaric warheads for Shahed-type UAVs and plays a vital role in Russia’s ongoing war against Ukraine.

“It is confirmed that our strike assets reached the target directly. A fire and heavy smoke were recorded in the area of the facility,” the Ukrainian military stated.

The effects of the strike are still being assessed, according to the report.

Fires and explosions in Sergiev Posad

On the morning of 4 July, Oksana Yerokhanova, head of the Sergiev Posad city district, confirmed that drones had attacked the town. She reported that a fire broke out at an electrical substation, leaving six neighborhoods without power.Yerokhanova also reported that two men were allegedly injured during the incident.

Geolocation confirms strike on key industrial site

Ukrainian Telegram channel ExileNova+ geolocated the black smoke column to Substation No. 94 “Zagorsk” (110/35/6 kV), believed to be part of the “Scientific Research Institute of Applied Chemistry.”

Additional footage shared by Exilenova+ shows Liutyi drones flying past the smoke column and striking separate locations.

Despite claiming the destruction of 48 drones overnight, the Russian Ministry of Defense did not mention any incidents in Moscow Oblast in its public statements.