An errant Russian defense missile mistakenly struck a major oil refinery in Moscow on Thursday, sending the site’s massive roof hurtling in the air like a flying saucer, jaw-dropping footage shows.

Video captured the Russian surface-to-air missile — meant to take out an overhead Ukrainian drone — miss and fly directly into the refinery’s storage tank, causing a powerful blast that launched the tank’s circular roof into the sky in a mushroom cloud before it crashed to the ground.

The refinery, one of Russia’s biggest, had already been battling flames and emitting thick, black smoke from a Ukraine onslaught when the missile hit, according to the clip posted on Telegram by Yan Matveev, a self-exiled Russian military analyst.

The facility provides more than a third of the fuel used around the Moscow region and had previously been attacked Tuesday.

Moscow authorities said in a statement hours after the blunder that “supplies of oil products to Moscow and the work of all gas stations in the city continue as normal.”

The mistake came as Ukraine launched one of its biggest drone attacks of the war at the Russian capital, helping to destroy the refinery in the latest embarrassment for Russian President Vladimir Putin.

Ukrainian President Volodymyr Zelensky said the massive drone barrage was in retaliation for a Kremlin strike that damaged a historic monastery in Kyiv this week, according to CBS News.

Ukraine has repeatedly targeted Russia’s oil infrastructure in efforts to cripple one of Moscow’s main revenue sources.

“If Ukraine is going to burn, your Moscow will burn, too,” Zelensky said in reference to Ukraine’s latest onslaught,, adding that the attack was part of Kyiv’s attempts to force Putin to the negotiating table.

“It is time to end the aggression, time to end this war,” he said.

Hours before the attack, Zelensky said he had an “important coordination call” with President Trump and French President Emmanuel Macron and that he secured additional support from allies at the G7 summit this week.

In response to the Ukrainian attack, Vyacheslav Volodin, speaker of the lower house of Russia’s parliament, warned that Moscow would respond by ramping up its strikes.

“Their action will lead to our counteraction and launching harsher blows, with more powerful weapons,” Volodin said in televised remarks.

Nationalist hardliner and media mogul Konstantin Malofeyev suggested Russia respond with nuclear weapons and slammed the Kremlin for fighting in a “gentleman-like way.

“War means victory at any cost,” Malofeyev wrote on his Telegram channel, adding the use of “the nuclear weapons that our ancestors created and stockpiled while mobilizing the entire country’s strength precisely for this purpose – to win.”

Putin, whose home city of St. Petersburg suffered a serious Ukrainian drone attack earlier this month, was about 430 miles east of Moscow in Kazan to meet with leaders of the Association of Southeast Asian Nations.

With Post wires