Russia’s oil refineries have been heavily targeted, damaging its energy facilities and the country’s fuel crisis.

Ukrainian drones have hit a Moscow oil refinery for the second time ⁠this week while Russia fired missiles at Kyiv, as President Volodymyr Zelenskyy seeks support from the United States and Europe to reach a deal to end the war.

Russia’s Defence Ministry said on Thursday that its air defences shot down 555 Ukrainian drones over several regions overnight, with almost 200 intercepted as they were approaching the Russian capital.

Moscow Mayor Sergey Sobyanin said several drones hit an oil refinery.

“Air defence forces continue to repel a massive attack. Several drones managed to reach the Moscow oil refinery,” Sobyanin said, adding that a shopping centre also suffered minor damage.

The attack on the oil facility is the second this week, after a drone attack on Tuesday halted operations at the refinery, according to the Reuters news agency, as widespread damage to Russian energy facilities worsens the country’s fuel crisis.

The regional governor said that in the surrounding Moscow region, a high-rise residential building, an industrial facility and a number of private houses were also damaged in the drone attack. The Sheremetyevo airport, Moscow’s busiest, suspended flights and evacuated people, as several sought shelter in the car park, the airport said in a statement.

Kyiv meanwhile came under a second Russian air attack this week, as ballistic missiles were unleashed on the Ukrainian capital, city officials said. Earlier this week, a major attack on Kyiv by Russia killed 11 people and damaged a UNESCO-listed 1,000-year-old monastery, drawing condemnation from European leaders. Russia denied striking the monastery.

The attacks come as Zelenskyy works to pressure Russia into negotiating an end to its more than four-year-long war. Zelenskyy said he had spoken to US President Donald Trump, French President Emmanuel Macron and other leaders from G7 countries to coordinate ways to end the ⁠war.

G7 leaders pledged to strengthen Ukraine’s air defences and increase pressure on Moscow’s war economy, including by tightening sanctions on the Russian oil and gas sectors.

Trump told reporters he was “gonna do whatever I can” to end the war.

Zelenskyy said he received important commitments from the G7, including “more air defence missiles along with licenses to produce them, and a winter support package.”

“Importantly, the US is ready to provide backstop across these lines of effort,” Zelenskyy wrote on X. “It is key that everything discussed be implemented. Russia must come to learn that its war will never be normalised.”