Ukrainian President Volodymyr Zelensky said on Thursday heavy drone attacks on Russia were retaliation for a strike that damaged a historic monastery in Kyiv this week, warning that 'Moscow will burn' if attacks continue.Scores of drones targeted the Russian capital overnight, hitting its oil refinery for the second time this week and blanketing the city in toxic smoke.It was Ukraine's largest drone attack on Moscow in years, sparking fires in and around the Russian capital and forcing evacuations at the country's largest airport, officials said.Footage captured the moment a Ukrainian drone struck the oil depot, sending a huge fireball into the sky as debris rained down around it.'We don't want this war, we never did, and everyone knows it, and our partners know it,' Zelensky said in a voice message sent to reporters on a WhatsApp group. 'But if Ukraine burns, your Moscow will burn.'At least ten people were killed on Monday across Ukraine in a drone and missile attack that damaged the 1,000-year-old Kyiv Pechersk Lavra monastery.Zelensky held talks Thursday in Brussels with Nato and European Union leaders, and the German and Ukrainian defense ministers signed an agreement to jointly develop an air defense system to counter ballistic missiles.He described it as the start of an 'anti-ballistic missile coalition' and invited others to join. Zelensky said on Thursday heavy drone attacks on Russia were retaliation for a strike that damaged a historic monastery in Kyiv this week, and that ' Moscow will burn' if attacks continue. Pictured: Smoke rising into the sky following a Ukrainian strike on a Russian oil refinery Black smoke rises from the area of the Russian oil producer Gazprom Neft's Moscow oil refinery on the south-eastern outskirts of Moscow on June 18, 2026 The lid of a Russian oil refinery at Kapotnya is blown into the air during a Ukrainian drone strike Black smoke rises from the refinery where a fire broke out following a strike as firefighting efforts continue in Moscow A woman walks outside a shopping mall as black smoke rises from the area of the Russian oil producer Gazprom Neft's Moscow oil refinery People are seen outside a shopping mall as black smoke rises from the area of the Russian oil producer Gazprom Neft's Moscow oil refineryZelensky called on Europe and the United States to increase pressure on Russia through sanctions on Russia's defence and energy sectors and broader economy to force President Vladimir Putin into ending the war.'Everyone needs to put pressure on Putin: Ukrainians, absolutely all the Europeans, Americans, and Russians - it's time to sober up and put pressure on your leader,' he said.Dramatic footage shared online appeared to show the chaos unfolding across Moscow. Other unverified videos purported to show large columns of black smoke over the city's skyline, while one clip showed drones buzzing overhead.In further footage, bystanders were heard screaming in terror as explosions rang out and what appeared to be a rocket flew overhead, while smoke poured from an apartment block.The large-scale attack came hours before Russian President Vladimir Putin was set to meet Southeast Asian leaders at a summit in the central city of Kazan, about 700 kilometres (435 miles) east of the capital.Thailand, Vietnam, Cambodia, Laos, Malaysia and Singapore sent their prime ministers, while the Philippines sent President Ferdinand Marcos. Russia's state-controlled TV channels only briefly mentioned the attack on Moscow.Pro-Kremlin newspapers reported it, with some praising the performance of air defenses while noting that the strike highlighted the need to further strengthen the defensive shield around the capital. Kyiv has stepped up its drone strikes on Russia in recent months, hitting oil refineries that fund Moscow's war chest, as diplomatic talks on ending the more than four-year conflict remain stalled.'Air defence forces are continuing to repel a large-scale attack. Several drones managed to reach the MNPZ (Moscow Oil Refinery),' Moscow Mayor Sergei Sobyanin wrote on Telegram, with authorities closing traffic on streets near the refinery.He did not specify damage to the facility, but several Russian media outlets reported that it was on fire.Russia's busiest airport - Moscow's Sheremetyevo - announced it had evacuated passengers to 'safe locations' during the barrage and was restricting flights. Smoke filling the sky and blocking the light after the oil refinery was hit in Russia People walk away from the smoke after the fire broke out following the Ukrainian strike Black smoke rises from the area of the Russian oil producer Gazprom Neft's Moscow oil refinery Ukraine launched its largest drone attack on Moscow in years on Thursday, sparking fires in and around the Russian capital and forcing evacuations at the country's largest airport, officials said Further footage shows bystanders screaming in terror as explosions ring out and smoke pouring from an apartment block