Russian authorities left residents in and around Moscow without air raid sirens or phone alerts during Ukraine's largest combined strike on Moscow Oblast, apparently to guard turnout at Russia's parliamentary elections, the Institute for the Study of War (ISW) said. The silence angered residents and even pro-war commentators as a major oil refinery burned.

For most of this war, Russia has handled strikes on its cities as a routine to be announced, warned about, and waited out. Withholding warnings during the heaviest raid yet, in the middle of a national vote, suggests authorities will trade residents' safety for the look of a calm election when a political milestone is on the line.

Sirens stayed off during the biggest raid

Ukraine hit strategic sites across the Moscow area overnight on 19-20 September, the last day of Russia's State Duma vote. Moscow Oblast officials did not switch on air alert sirens or send the SMS warnings they had used during far smaller attacks. They quietly restricted mobile service without major public notice. Ukraine struck oil and logistics targets, not polling stations, according to the experts, and authorities appeared to place high turnout above protecting civilians.

Moscow Oblast residents complained that no alert reached them, some posting on the Telegram channel of regional Governor Andrei Vorobyov before it closed comments. A prominent Kremlin-linked military blogger attacked the official response, saying it erodes public trust and that cutting mobile service does "not really help."

What the drones hit

Ukraine's General Staff reported striking the Gazpromneft-Moscow Oil Refinery in the city's Kapotnya district, one of Russia's largest plants, causing a large fire. Ukrainian manufacturer Fire Point said its FP-1 drones completely shut down the refinery, with all primary processing units damaged.

Governor Andrei Vorobyov claimed air defenses countered 249 drones across 17 municipal districts. The strike was part of Ukraine's widening campaign against the fuel sector funding Russia's war, with about a fifth of Russian refining capacity offline.

An oil refinery in Slavyansk-on-Kuban in southern Russia was attacked overnight on 13 September, Astra reported. By morning, residents began posting videos showing smoke over the refinery and nearby areas. That same morning, Ukraine’s Defense Intelligence (HUR) reported that Ukrainian drones had struck the Slavyansk-EKO refinery.

Ukrainian strikes on Russian oil refineries have become systematic, aimed in part at reducing the Russian military’s access to fuel, which is critical for waging the war. Ukrainian forces have been striking strategic facilities located hundreds of kilometers from the front line.

The design capacity of Slavyansk-EKO is approximately 5.2 million tonnes per year, though actual volumes are lower by about one to two million tonnes, Militarnyi reports.

Thick smoke visible for dozens of kilometers

The Ukrainian strike hit a key oil-processing unit and the facility’s oil storage tank farm, which “fuels the criminal war against Ukraine,” HUR reported.

Two oil storage tanks were destroyed in the strike, according to photos published by Dnipro Osint. Militarnyi noted that the photos also show damage to neighboring tanks.

The strike reportedly hit the area containing the facility’s largest storage tanks. The refinery operates using purchased or tolling crude oil because it does not have its own crude oil production base.

The refinery has been targeted before

Slavyansk-EKO is one of the largest independent oil refineries in southern Russia. The facility is located in Slavyansk-on-Kuban, about 69 kilometers northwest of Krasnodar.

Ukraine’s General Staff said that the refinery is “part of the energy rear of the Russian Federation and involved in supplying the armed forces of the aggressor.”

Before the 13 September strike, Ukrainian drones had struck the refinery at least four times, starting in 2024:

• 27 April 2024 — a Ukrainian drone attack damaged the Slavyansk refinery, after which a fire broke out at the facility.
  
• 19 May 2024 — SBU drones attacked the Slavyansk refinery, after which the facility suspended operations.
  
• 26 January 2026 — Ukrainian Defense Forces struck infrastructure at the Slavyansk-EKO refinery. According to preliminary data, elements of the primary oil refining unit were damaged.
  
• Five months later, on 28 June, Ukraine struck the Slavyansk refinery again, causing a large fire at the facility. EP noted that the refinery supplies fuel, including to occupied Crimea.
  

Ukrainian drones struck the Ryazan oil refinery in Russia on the morning of 6 September and set one of its core units on fire, Ukrainian defense outlet Militarnyi reported. The unit produces the high-octane component the Rosneft plant needs for its higher grades of gasoline. Russian regional authorities acknowledged a fire without naming the site. Ryazan is situated southeast of Moscow, about 470 km from Ukraine.

What burned at Ryazan

Drones hit the low-temperature isomerization unit for pentane-hexane fractions, designated Izomalk-2-LIN-800, according to Militarnyi's analysis. The unit sits on the refinery's grounds and is one of the critically important links in the plant's production cycle.

It converts low-octane straight-run oil fractions into a cleaner high-octane blending component. That component is what allows the refinery to produce gasolines of the higher environmental classes, Euro-5 among them, without adding harmful additives. 

Ukrainian monitoring channel Exilenova+ published videos of the strike.

The same unit was hit in December

Drones already attacked this unit in December 2025 and damaged it. Earlier waves targeted the plant's ELOU-AVT-3, ELOU-AVT-6, and AVT-1 units.

By May 2026 the refinery had lost 90–100% of its refining capacity. Satellite imagery from 3 August 2026 showed Ukraine's Defense Forces had disabled two of the four crude distillation units on site.

Ukrainian drones struck the refinery in May, and FP-1 drones set it and a nearby warehouse burning in July.

Russian officials report a fire, not a target

Ryazan Oblast governor Pavel Malkov confirmed the region came under drone attack. Drone debris damaged residential buildings in Ryazan and Sapozhkovsky district, he stated, and a fire broke out at an enterprise he did not name. He said there were no casualties and that emergency services were working.

Russian news Telegram channel Astra said its analysis of photographs taken by residents established that the fire was on the grounds of the Ryazan refinery. Ukrainian channel Exilenova+, which tracks such attacks, also reported a hit on the plant.

Russia's fuel squeeze

Ukraine's General Staff said strikes on 26 August and 1 September fully stopped two large refining enterprises: Lukoil-Nizhegorodnefteorgsintez in Kstovo, Nizhny Novgorod Oblast, and the Novatek-Ust-Luga complex in Leningrad Oblast. Both supply the Russian army.

Short of gasoline, Russia has been buying more fuel abroad. Moscow discussed importing gasoline from Kazakhstan in June, and a Kazakh refinery deal would cover 0.3% of Russian demand. Belarus increased its gasoline supplies to Russia nearly 20-fold in the first half of the year.

Kazakhstan’s privately owned Kondensat refinery will process Russian crude and return about 70% of the resulting petroleum products to Russia, Kazakh Energy Minister Yerlan Akkenzhenov said on 25 August, Radio Liberty reported.

Based on figures reported by Radio Liberty, the roughly 70% of Kondensat’s maximum gasoline output bound for Russia would amount to about 0.3% of the country’s daily summer gasoline demand. That makes the arrangement a limited stopgap rather than a solution. John Roberts of the Atlantic Council nevertheless told the outlet that even small additional supplies could help during an acute shortage, including at the front: “It helps, but it doesn’t solve the problem.”

Ukrainian drone strikes have knocked dozens of Russian refineries offline in recent months, forcing Moscow to restrict fuel exports and reimpose rationing, Radio Liberty reported. Gasoline caps returned to Moscow and St. Petersburg in August, while Rosneft reportedly limited fills to 30 liters per car at every station nationwide.

Kondensat has processed Russian oil before. The refinery began handling supplies delivered through Tatneft’s TANECO refinery in 2024, when Kazakhstan and Russia agreed to permit exports of fuel produced from Russian feedstock back to Russia. The arrangement was renewed in 2025, according to Radio Liberty.

Central Asia has no spare refining capacity that could materially change Russia’s situation, Ukrainian energy analyst Hennadiy Riabtsev told Radio Liberty’s Schemes project. Possible contributions from Kazakhstan, Kyrgyzstan, India, China, and Belarus would remain a drop in the ocean for the Russian market, he said.

Prospective suppliers also understand that Russian fuel demand supports the war effort and that assisting Moscow could carry sanctions risks, Ukraine’s presidential sanctions commissioner, Vladyslav Vlasiuk, told Schemes. Kyiv therefore does not expect a queue of countries willing to supply Russia with petroleum products, he said.

Russia’s fuel shortage gives Kazakhstan room to bargain

Russia’s shortage has spread from gas station queues to farming and public transport, with fuel-sale restrictions officially covering more than 40 regions by July, Euromaidan Press reported, citing The Moscow Times. Moscow’s export restrictions have also raised prices and tightened supplies across Central Asia.

Yet Russia’s growing dependence gives Kazakhstan additional bargaining room. Ukrainian strikes have previously prompted Russian retailer Wildberries to expand its warehousing operations in Kazakhstan, while Astana has promoted domestic competitors.