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The largest Ukrainian drone attacks on the Moscow region have claimed two lives, leaving six people injured.
Moscow Mayor Sergei Sobyanin said 450 drones heading for the capital had been shot down in what he called an "unprecedented attack", as Russia kicks off the final day of parliamentary elections.
An oil refinery was damaged, and several homes were set ablaze.
Ukraine and Russia have continued attacks on each other’s energy infrastructure despite an announcement by US President Donald Trump on Monday that they had agreed to halt the strikes.
Drone attacks were to disrupt the election, claim Russia
"The unprecedented attack was clearly planned with the aim of disrupting the elections," he said. "The adversary failed to achieve this."
Ukraine's President Volodymyr Zelensky confirmed Kyiv had hit a "key" Russian oil facility and a logistics site in the region, representing "billions of dollars that sustain the war machine".
As reported by Reuters, people in Moscow heard blasts and saw plumes of smoke billowing from the site of the refinery.
Oil shortage in Russia amid Ukraine attacks
Ukrainian strikes have damaged a significant part of Russia's oil refining capacity, triggering oil product shortages, fuel price increases and long queues at filling stations in many regions across the country.
The Moscow plant, which has been targeted multiple times, processed 11.6 million metric tonnes of oil in 2024, producing 2.9 million tonnes of gasoline and 3.2 million tonnes of diesel.
In the wider Moscow region, in addition to the two deaths, 400 people, including 70 children, were evacuated from a 21-storey apartment block in the Ramenskoye district and a number of homes were damaged, said Governor Andrei Vorobyov.
Russia's parliamentary election
Sunday is the third day of voting in an election that is tightly controlled by the Kremlin and which critics have dismissed as neither free, fair nor transparent.
Russian state media reported that an election official was one of two people killed by a drone attack on a bus in a Moscow-controlled part of Kherson in Ukraine on Sunday, citing the head of Russia's election commission.
Meanwhile, Moscow's biggest airport Sheremetyevo warned passengers "temporary restrictions" were in place overnight, while at the capital's Vnukovo airport all arrivals and departures were halted.
