Vladimir Putin is facing growing humiliation on his own doorstep as Ukraine inflicts one embarrassing blow after another in Russia's capital.Thursday's huge oil depot strike was the latest example of President Zelensky asserting himself well inside Russian territory.It is the latest in a string of successful Ukrainian drone attacks that have increasingly targeted the infrastructure underpinning Russia's war effort, with Putin even forced to massively scale back his Red Square military parade this year for fear of it being attacked by Kyiv's drones. And in a sign of growing frustration, the Kremlin on Friday threatened 'nuclear strikes with catastrophic consequences' if the West refuses to accept Putin's demands over Ukraine. The drone attack on Thursday saw scores of drones target Moscow, hitting its oil refinery for the second time this week. Moscow residents complained of black rain falling from the sky following the attack, which the city's authorities denied. But Moscow's official Telegram channel later warned residents of the affected district to stay indoors and keep their windows closed, adding that families with children, elderly people and asthmatics should leave the area immediately. 'We don't want this war, we never did, and everyone knows it, and our partners know it,' Zelensky said. 'But if Ukraine burns, your Moscow will burn.' Earlier this month, Ukraine staged a massive attack on a major oil port in St Petersburg just hours before the opening of Putin's flagship international investment summit. 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 strikeThe oil terminal on the Gulf of Finland is one of Russia's largest fuel storage and export facilities, handling 12.5 million tonnes of fuel annually. The strike occurred shortly before the St Petersburg International Economic Forum, known as 'Russia's Davos', where Putin seeks to project economic strength and international relevance despite Western sanctions and the war in Ukraine.The attack made a mockery of the forum's theme, 'Pragmatic dialogue - the path to a stable future', while also exposing glaring weaknesses in Russian air defences. The facility is located just 12 miles from the forum venue, yet Moscow failed to prevent the strike.Over recent months, Kyiv has repeatedly struck refineries, oil terminals, pumping stations and export facilities deep inside Russian territory. Among the most significant targets were the NORSI refinery near Nizhny Novgorod, Russia's fourth largest refinery with capacity to process 16 million metric tonnes of oil annually. It suspended operations on April 5 following a drone attack.The Moscow refinery was also hit on May 19, and the Ryazan refinery on the 15th, which accounts for almost five per cent of Russia's refining volumes.The Perm refinery, which processed around 12.6 million metric tonnes of oil in 2024, halted processing on May 7 after a drone attack caused a fire and damaged equipment.