Ukraine launched an extensive long-range drone assault against Russia on Sunday, September 20, in an operation Russian officials described as the largest drone attack Moscow has faced during the war, damaging an oil refinery and residential property as Russians cast ballots on the final day of parliamentary elections.
The scale of the operation extended far beyond the Russian capital. Russian authorities reported intercepting more than 1,000 Ukrainian drones during the overnight assault, although figures varied as officials provided updates covering different periods.
Russia's Defence Ministry initially reported that 1,110 drones had been intercepted across Russia and Russian-controlled territories, according to the Financial Times. Moscow Mayor Sergei Sobyanin later said more than 1,600 drones had been brought down since Saturday, including about 450 heading toward Moscow. The full interception totals have not been independently verified.
Sobyanin described the operation against Moscow as unprecedented and said several drones reached the grounds of the city's oil refinery.
Reuters journalists in Moscow reported hearing explosions and seeing large columns of smoke rising from the refinery. The precise extent of the damage was not immediately clear. The facility has previously been targeted during Ukraine's campaign against Russian energy infrastructure.
Ukraine has increasingly sought to use long-range weapons against facilities it says contribute to Russia's ability to finance and sustain its military operations.
Ukrainian President Volodymyr Zelenskyy said after the latest operation that Ukrainian long-range weapons had targeted oil and logistics facilities. AP reported that Zelenskyy said domestically produced weapons were involved, including Ukrainian drones and missiles.
Civilian casualties reported around Moscow
The assault also affected residential areas around the capital.
Initial reports from Moscow regional authorities said a 74-year-old man and a 44-year-old woman were killed and others injured. Later on Sunday, Moscow region Governor Andrei Vorobyov said a third person had died in hospital from injuries sustained during the attack, according to Reuters.
Hundreds of civilians were also evacuated.
Reuters reported that about 400 people, including 70 children, were removed from a 21-storey apartment building in the Ramenskoye district after the strikes. Several homes were damaged.
The assault also disrupted aviation around Moscow. The Financial Times reported that flights were grounded at the capital's three major airports during the attack.
Attack coincides with Russian election
The timing added a political dimension to an already significant military operation.
Russia was holding the final day of voting in its first State Duma election since Moscow launched its full-scale invasion of Ukraine in February 2022. Russian authorities also organised voting in Ukrainian territories Moscow claims to have annexed, a process rejected by Kyiv.
Sobyanin alleged that the drone operation was deliberately timed to interfere with the election. However, that assertion represents the Russian government's interpretation of Ukraine's intentions and has not been independently established.
Russian election authorities separately reported cyberattacks against voting systems during the election period but said voting continued.
Ukraine has denounced voting conducted by Russia in occupied Ukrainian territories as illegitimate.
Energy infrastructure remains a major target
The latest attack highlights the continuing importance of energy infrastructure in the conflict.
The Moscow refinery processed about 11.6 million metric tonnes of crude oil in 2024, according to figures cited by Reuters, producing approximately 2.9 million tonnes of gasoline and 3.2 million tonnes of diesel.
Ukraine's long-range campaign has repeatedly targeted Russian refineries and other energy facilities, seeking to disrupt fuel supplies and reduce revenues that Kyiv says support Moscow's military operations.
Russia has simultaneously continued missile and drone attacks against Ukraine. Both countries maintain that they do not deliberately target civilians, even as strikes on both sides have resulted in civilian deaths.
The latest escalation also comes despite diplomatic discussions about limiting attacks on energy infrastructure. Reuters reported that strikes against energy facilities have continued despite an earlier announcement by U.S. President Donald Trump that Russia and Ukraine had agreed to halt such attacks.
Long-range war reaches deeper into Russia
The September 20 assault demonstrates the expanding range and scale of Ukraine's domestically produced strike capabilities.
While the exact number of drones launched and destroyed remains difficult to independently establish, reporting from AP, Reuters and the Financial Times supports the broader picture of an exceptionally large operation involving hundreds of drones directed toward the Moscow area and additional attacks elsewhere in Russia.
For Moscow residents, the attack brought some of the direct consequences of the continuing war to the Russian capital at the same time voters were participating in a nationally significant election.
With both countries continuing long-range attacks and no comprehensive ceasefire in place, Sunday's operation underscores how drones, missiles and attacks on energy infrastructure remain central features of a conflict now well into its fifth year.
