Ukrainian drone strike halts Moscow oil refinery on day of State Duma vote
On the night of 20 September, Ukrainian forces struck the Gazpromneft-Moscow refinery in the Kapotnya district of Moscow with a combined drone and missile attack, setting both primary crude distillation units ablaze and forcing a full halt of oil processing. Ukraine's General Staff says cumulative strikes have now knocked out more than 45% of Russia's designed oil refining capacity. The attack fell on the day of Russia's State Duma election, with Moscow authorities not activating air raid sirens or SMS warnings, an omission analysts at the Institute for the Study of War linked to a priority on voter turnout over civilian safety.
Key points
- Ukrainian forces struck the Gazpromneft-Moscow NPZ in Moscow's Kapotnya district overnight on 20 September, hitting the AVT-6 primary refining unit, the Euro+ combined unit and an isomerization unit.
- Both primary crude distillation units caught fire and the refinery fully halted oil processing; repairs may take several weeks and fuel from the plant was withdrawn from the St. Petersburg exchange from 21 September.
- The AVT-6 unit processes 21,400 tons of oil per day (53% of capacity) and the Euro+ unit 18,800 tons per day (47%); the plant processed 11.6 million tons of crude in 2024.
- Ukraine's General Staff said cumulative Ukrainian strikes have disabled more than 45% of Russia's designed refining capacity as of 21 September, with a reported shortage of Euro-5/K5 gasoline and diesel inside Russia.
- Mayor Sergei Sobyanin called it the largest-ever drone attack on Moscow, claiming over 1,600 drones were downed (450 on approach); the Russian Defence Ministry said more than 1,900 drones and projectiles were intercepted overnight.
- Russian authorities did not activate air raid sirens or send SMS warnings in Moscow Oblast during the attack; ISW analysts assessed authorities prioritised voter turnout in the State Duma elections over public safety.
- At least two people were killed in Moscow Oblast and several residential buildings were damaged, according to Russian authorities.
- President Volodymyr Zelensky confirmed the strike and said Moscow must end the war; he announced plans to meet US President Donald Trump in New York at the UN General Assembly.
Why it matters
The Moscow refinery is one of Russia's largest, with annual capacity of about 11–12 million tons of oil and a major role in supplying the Moscow fuel market, so taking it offline has immediate downstream effects inside Russia. Ukraine's General Staff says cumulative Ukrainian strikes have now disabled more than 45% of Russia's designed refining capacity, with reported shortages of Euro-5/K5 gasoline and diesel already visible. The strike landing on State Duma election day, combined with the absence of air raid sirens or SMS warnings, has been read by ISW analysts as evidence that Moscow prioritised the appearance of a normal vote over public safety, and Zelenskyy has publicly linked the operation to his demand that Russia end the war and to upcoming diplomacy with Donald Trump at the UN General Assembly.
What happened
On the night of 20 September, Ukrainian Defence Forces carried out a large-scale combined drone and missile attack on Moscow and Moscow Oblast. The strike hit the Gazpromneft-Moscow Oil Refinery in the Kapotnya district, damaging the AVT-6 primary refining unit (21,400 tons/day, 53% of capacity), the Euro+ combined processing unit (18,800 tons/day, 47%) and an isomerization unit. Both primary crude distillation units caught fire after drones fell on the plant, and the refinery fully halted oil processing. Reuters reported, citing three industry sources, that repairs could take several weeks, and that fuel from the Moscow NPZ was withdrawn from sale on the St. Petersburg International Mercantile Exchange from 21 September. Ukrainian defence company Fire Point said FP-1 drones struck the refinery, with FP-5 Flamingo cruise missile launches also documented during the night attack. Ukraine's General Staff said the strike on the Moscow refinery contributed to a cumulative toll in which more than 45% of Russia's designed oil refining capacity is now out of operation as of 21 September, with a reported shortage of Euro-5/K5 gasoline and diesel inside Russia. Moscow Mayor Sergei Sobyanin called it the largest-ever drone attack on the capital and claimed more than 1,600 drones were downed (450 on approach); Russia's Defence Ministry said more than 1,900 drones and projectiles were intercepted overnight. Russian authorities reported at least two people killed in Moscow Oblast and damage to several residential buildings. Air raid sirens were not activated and SMS warnings were not sent in Moscow Oblast during the attack. President Volodymyr Zelenskyy confirmed the strike on X, said Moscow must end the war and choose peace, and announced plans to meet US President Donald Trump in New York during the UN General Assembly the following week. The attack coincided with the State Duma election day; exit polls cited in coverage had United Russia leading with about 49.4% of the vote.
How Ukrainian sources describe it
Ukrainian sources centre the story on the strike's strategic effect: the hits on specific refinery units (AVT-6, the Euro+ combined unit, and an isomerization unit), the fires at both primary distillation units, the full halt of refining, and the General Staff's claim that Ukrainian strikes have now knocked out more than 45% of Russia's designed oil refining capacity, with resulting shortages of Euro-5/K5 gasoline and diesel. Coverage foregrounds Zelenskyy's confirmation of the strike, his framing that Moscow must end the war, and the planned meeting with Donald Trump at the UN General Assembly. Ukrainian outlets highlight Russia's failure to activate air raid sirens or issue SMS warnings during the largest drone attack on Moscow to date, and amplify the ISW assessment that Russian authorities prioritised voter turnout over civilian safety while underscoring that Ukrainian forces did not deliberately target polling stations or election infrastructure. Domestic weapons systems are credited by name: FP-1 drones from Fire Point, FP-5 Flamingo missiles, and a range of other drones including RZ-100, MICH-2000, 'Palanytsia', Vendetta, 'Liutyi', 'Bars' and 'Sichen', with the wider strikes reported to have also hit targets in Voronezh Oblast.
How international sources describe it
International coverage transmitted via Reuters, republished in Ukrainian outlets, emphasises operational effects on the refinery: a full halt of crude processing, fires at both primary distillation units, a weeks-long repair timeline, and the absence of Moscow NPZ fuel from the St. Petersburg International Mercantile Exchange from 21 September, supplying concrete market indicators rather than political framing. The single German-language outlet frames the event primarily as a 'major Ukrainian attack' on Moscow with 'hundreds of drones' during Russian elections, situating the strike in the context of the State Duma vote day rather than emphasising refinery technical details. International reporting carries Russian official claims of 1,600+ drones downed (450 on approach to Moscow) and the Russian Defence Ministry's figure of 1,900+ drones and projectiles intercepted overnight without independently verifying them, while leaving Sobyanin's 'repelling' claim as an attributed statement. Casualty reporting from Russian authorities (at least two killed in Moscow Oblast, residential damage) is balanced against ISW's analytical observation that Ukraine did not deliberately target election infrastructure, mixing on-the-ground impact with the analytical caveat about intent.
Where reporting differs
Moscow Mayor Sergei Sobyanin claimed the largest-ever drone attack on Moscow was repelled with over 1,600 drones downed (450 on approach), while Reuters reporting and Ukraine's General Staff indicated that multiple drones reached the refinery, both primary distillation units caught fire and the plant fully halted oil processing, with repairs expected to take weeks and the refinery's fuel withdrawn from exchange sales. Russian authorities and Sobyanin asserted the attack aimed to disrupt the State Duma elections, whereas ISW analysts concluded that Russian authorities prioritised voter turnout over public safety by not activating sirens or sending SMS warnings, and stressed that Ukrainian forces targeted strategic oil and logistics infrastructure rather than polling stations. Russian sources framed the strike as ineffective and reported only the downing of drones and projectiles, while Ukrainian sources (General Staff, Fire Point, Reuters industry sources, OSINT analysts Astra) documented hits on AVT-6, a combined processing unit and an isomerization unit, fires at both primary distillation units, and a full halt of refining.
Background
The Gazpromneft-Moscow NPZ operates two primary refining units: AVT-6 (21,400 tons/day, 53% of capacity) and the Euro+ combined unit (18,800 tons/day, 47%). In 2024 it processed 11.6 million tons of crude oil, roughly 230,000 barrels per day, and produced 2.9 million tons of gasoline, 3.2 million tons of diesel and 1.3 million tons of bitumen. Russian accounts described the use of FP-1, RZ-100, MICH-2000, 'Palanytsia', Vendetta, 'Liutyi', 'Bars' and 'Sichen' drones together with FP-5 'Flamingo' cruise missiles in the strike, while Ukrainian defence company Fire Point specifically reported FP-1 hits on the refinery. OSINT analysts counted 91 attacks on various Russian oil refineries since the start of 2026, with the 20 September strike described as the seventh such attack that month. Exit polls cited in coverage put United Russia ahead in the State Duma vote with about 49.4% of the ballots.