Ukrainian Drone Strikes Halt Operations at Moscow, Ryazan Oil Refineries
AI Analysis
Ukrainian drone strikes successfully targeted multiple Russian oil refineries (Moscow, Ryazan, Nizhny Novgorod, Yaroslavl) and supporting infrastructure, halting operations at several key facilities. Ukraine is employing domestically produced long-range drones, including the RS-1 Bars, FP-1 Firepoint, and BARS-SM Gladiator, in these attacks. Russian claims of intercepting over 550 drones suggest a high volume of launched UAS, while Ukrainian officials confirm successful impacts.
Key Takeaways
- Ukrainian drone strikes halted operations at the Moscow and Ryazan oil refineries, with potential restart delays of several days.
- Targets included Angstrem semiconductor plant (defense industry), Solnechnogorsk & Volodarskoye oil pumping stations, Lukoil-Nizhegorodnefteorgsintez refinery, and Yaroslavl-3 oil pumping station.
- Ukraine is utilizing domestically produced long-range drones (RS-1 Bars, FP-1 Firepoint, BARS-SM Gladiator) for these attacks.
- Reported damage includes fires, damage to storage tanks (140,000 cubic meters capacity), and minor injuries (12 people).
- Russian authorities claim a high intercept rate (550+ drones), but Ukrainian sources confirm successful strikes on high-value targets.
Why It Matters
These strikes demonstrate Ukraine's increasing ability to project force deep into Russian territory and target critical energy infrastructure, impacting Russia’s fuel supply and potentially its military logistics. The use of domestically produced drones highlights Ukraine’s growing indigenous defense industrial base and reduces reliance on foreign aid. Successful penetration of Russian air defenses, despite claimed intercept rates, indicates vulnerabilities in Russia’s counter-UAS capabilities.
Two major Russian oil refineries suspended operations after recent Ukrainian drone strikes, Reuters reported on Wednesday, May 20, citing industry sources.
According to the report, Moscow’s oil refinery halted processing after a Ukrainian drone attack on Sunday, May 17.
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While the strike reportedly caused only limited physical damage, refinery operations were stopped “protectively to mitigate risks,” two industry sources told Reuters. They added that restarting the facility could take several days.
Moscow Mayor Sergei Sobyanin earlier said a drone had crashed near the refinery. According to preliminary data cited by Sobyanin, 12 people were injured in the strike, most of them construction workers near the plant’s entrance.
The refinery, owned by Gazpromneft, is located in southeastern Moscow and supplies fuel to the Russian capital.
Industry sources told Reuters the plant processed 11.6 million metric tons (12.8 million US tons) of crude oil in 2024, producing 2.9 million metric tons (3.2 million US tons) of gasoline, 3.2 million metric tons (3.5 million US tons) of diesel and 1.3 million metric tons (1.4 million US tons) of bitumen.
According to the Ukrainian General Staff and the Security Service of Ukraine (SBU), Ukrainian forces struck several facilities linked to Russia’s military-industrial and energy sectors.
Targets reportedly included the Angstrem semiconductor plant in Zelenograd, which produces microchips for Russia’s defense industry, the Moscow oil refinery in the Kapotnya district, and the Solnechnogorsk and Volodarskoye oil pumping stations – key parts of the fuel supply network serving Moscow and Russian military logistics.
Ukraine also said it hit a semiconductor production facility supplying components for precision weapons, as well as oil storage and fuel transport infrastructure used by the Russian military.
According to the General Staff, domestically produced long-range drones, including the RS-1 Bars, FP-1 Firepoint, and BARS-SM Gladiator systems, were used in the operation.
Russian authorities claimed more than 550 Ukrainian drones were intercepted across multiple regions, though Ukrainian officials said several high-value targets were successfully hit.
Meanwhile, the Kremlin made no mention of this attack, which was one of the largest operations carried out by Ukrainian drones against Moscow and the surrounding areas since the start of the war.
Reuters also reported that Russia’s Ryazan oil refinery halted operations after a Ukrainian drone strike on Friday, May 15. The attack ignited a major fire.
Later, Ukraine’s General Staff confirmed the strike, adding that this oil refinery is one of the largest in Russia, with an annual capacity of approximately 17 million tons (about 18.7 million US tons) of crude oil, accounting for nearly 5% of Russia’s total refining capacity.
Industry sources cited by Reuters said the refinery processed 13.1 million metric tons (289 million barrels) of crude oil in 2024 and produced 2.2 million metric tons (17.4 million barrels) of gasoline, 3.4 million metric tons (27 million barrels) of diesel and 4.3 million metric tons (31.5 million barrels) of fuel oil.
On Wednesday, the General Staff also confirmed strikes on the “Lukoil-Nizhegorodnefteorgsintez” oil refinery in the Nizhny Novgorod region and the “Yaroslavl-3” oil pumping station in the village of Semibratovo in the Yaroslavl region.
It has been preliminarily confirmed that four storage tanks with a total capacity of 140,000 cubic meters (4.9 million cubic feet) were damaged.
The station is a key component of the Russian Federation’s oil transportation system and plays a role in supporting state’s military-industrial infrastructure.
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