Ukraine has brought the war into the heart of Russia with drone attacks that Russian authorities said damaged residential buildings in the city of Kazan, some 600 miles from the front line.

Ukraine struck deep into Russian territory on Saturday with drone attacks targeting the city of Kazan in the Tatarstan region, over 1000 kilometres from the front lines. Local authorities reported that eight drones hit the city, damaging residential buildings and industrial facilities, but no casualties were reported.