Footage appears to show the moment a Ukrainian drone hit a building in Russia’s Tatarstan region.
Reuters was able to verify the location from the nearby buildings in the town of Yelabuga, more than 1,300km (807 miles) from the Ukraine-Russia border.
The attack is the deepest into Russian territory since the start of the war.
According to media reports, at least 12 people – all of them students – were injured.
