Ukraine launched a large-scale overnight drone attack targeting an oil refinery in Russia’s Yaroslavl region, major Baltic oil export ports in the Leningrad region, and an industrial facility in Kaluga, according to Russian officials and local media.
On Monday, Yaroslavl Governor Mikhail Yevraev claimed that more than 70 Ukrainian drones were shot down on their approach to the region. Two people were reportedly hospitalized with shrapnel wounds.
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According to the Russian outlet Astra, the primary target was the Slavneft-YANOS oil refinery, one of Russia’s five largest refineries, with an annual processing capacity of 15 million tons.
Authorities temporarily closed roads near the refinery but did not report any damage. The facility was previously targeted on June 28 and has reportedly come under attack at least five times since December 2025.
Ukraine also targeted Russia’s Leningrad region, Governor Alexander Drozdenko said, claiming that 62 drones had been intercepted.
According to Drozdenko, the attack damaged infrastructure at the Luga military training ground as well as the seaports of Ust-Luga and Vysotsk. However, no casualties were reported.
Ust-Luga is one of Russia’s largest Baltic oil export terminals, handling around 700,000 barrels of oil per day, along with crude oil, fuel oil, and vacuum gas oil.
According to Reuters, oil product exports through the port exceeded 32.8 million tons in 2025.
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The nearby port of Vysotsk hosts a Lukoil oil terminal that handled nearly 9 million tons of petroleum products in 2025, as well as coal and Novatek liquefied natural gas terminals.
Meanwhile, Kaluga Region Governor Vladislav Shapsha said a Ukrainian drone attack caused a fire at an industrial enterprise in the Dzerzhinsky district. Employees were evacuated with no injuries reported.
The district is home to the region’s largest petrochemical facility, Pervy Zavod. Shapsha added that Russian air defenses shot down 16 drones over the region.
Separately, Astra reported that air raid sirens sounded in Chelyabinsk for the first time since the start of Russia’s full-scale invasion of Ukraine.
According to local media, sirens were activated in Chelyabinsk, Chebarkul, and Magnitogorsk, after residents reported spotting a drone. Chelyabinsk lies about 1,800 kilometers (1,118 miles) from Ukrainian-controlled territory.
Air raid warnings were also broadcast on television.
Local reports said students and teachers at a pedagogical university were sent to a basement shelter, while a woman in labor was also evacuated underground. As a result, Chelyabinsk Airport temporarily suspended operations.
Chelyabinsk Region Governor Alexei Teksler did not publicly comment on any drone attack.
Russia’s defense ministry claimed that its air defenses intercepted or destroyed 519 Ukrainian fixed-wing drones overnight across multiple regions, including Belgorod, Bryansk, Kursk, Yaroslavl, Kaluga, Leningrad, Moscow, Crimea, and over the Sea of Azov.
Ukraine’s Security Service (SBU) said it had joined other components of the Defense Forces in a coordinated overnight operation targeting the Yaroslavl Oil Refinery, the Vysotsk oil terminal, and several military facilities in Russian-occupied Crimea.
“Fulfilling the tasks set by President Volodymyr Zelensky within the framework of systematically reducing the military and economic potential of Russia, the Security Service of Ukraine, together with the Defense Forces, carried out a series of successful strikes against Russia’s fuel, energy, and military infrastructure, as well as facilities in temporarily occupied Crimea,” the SBU said.
According to the agency, Ukrainian drones struck both the Yaroslavl Oil Refinery and the Yaroslavl Linear Production and Dispatch Station, with explosions and smoke reported at the refinery.
The SBU also claimed a successful strike on the Vysotsk seaport oil terminal in Russia’s Leningrad region.
“The strike disabled two oil tankers and damaged three fuel storage tanks,” the agency said.
The operation also targeted the Pervy Zavod refinery in Russia’s Kaluga region, where a fire broke out following the drone strike, according to the SBU.
Separately, the agency reported carrying out strikes against multiple military targets in occupied Crimea.
According to the SBU, drones hit three aircraft hangars at the Gvardiyske air base, as well as a Pantsir-S2 air defense system near Simferopol, a Russian mobile fire group in Kerch, and an oil storage tank and pumping station at the TES-Terminal-1 fuel depot.
SBU chief Yevhen Khmara said the campaign was aimed at steadily eroding Russia’s ability to wage war.
“On the president’s instructions, we are doing everything possible to ensure Russia pays a daily price for its crimes. As long as the enemy continues attacking peaceful Ukrainian cities, its military and fuel infrastructure will continue to suffer significant losses.”
“We are systematically destroying the resources that fuel Russia’s war machine, and this work will only intensify,” he added.
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