Ukrainian forces carried out one of the largest drone attacks of the war on Moscow and its surrounding region overnight into Sunday, according to Russian authorities. The assault killed two people in the Moscow region and damaged a major oil refinery in the capital.

Moscow Mayor Sergei Sobyanin stated that more than 1,600 drones heading toward the Moscow region were shot down, including 450 approaching the city itself. He described the strike as unprecedented and suggested it aimed to disrupt Russia's parliamentary elections, which concluded on Sunday. An oil refinery facility was hit, along with a residential building, though no fatalities occurred in the city proper.

Moscow regional Governor Andrei Vorobyov reported that two residents died and 20 others were injured across the wider region. Fires broke out at several sites, including a warehouse and apartment buildings, prompting evacuations of hundreds of people. All four airports in the Moscow area imposed temporary flight restrictions, grounding dozens of flights.

Ukrainian President Volodymyr Zelensky confirmed the operation and noted the use of domestically produced drones and missiles, including new ballistic variants. Russian defense officials said they intercepted over 1,100 drones nationwide during the barrage.

The attack occurred amid ongoing Russian strikes on Ukrainian territory, with reports of casualties in Kyiv and Sumy regions the previous day. Both sides maintain they avoid targeting civilians, though energy infrastructure has been a repeated focus for Ukraine in recent months.

This escalation highlights the intensifying long-range campaign by Ukrainian forces against Russian rear areas, even as elections proceeded under heightened security. Russian officials emphasized that voting continued despite the threat.