Across the country, swarms of small explosive drones descended onto military bases and destroyed a large part of Russia's nuclear bomber fleet. The flying bombs were smuggled into Russia by Ukrainian intelligence services in a plot known as Operation Spiderweb.

Ukraine says it has completed its biggest long-range attack of the war with Russia on Sunday, after using smuggled drones to launch a series of major strikes on at least 40 Russian warplanes at four military bases.

Ukrainian drones hit several Russian strategic airfields on Sunday, including the Belaya military base deep in eastern Siberia, after Moscow launched one of the longest drone and missile attack against Kyiv.