A major operation has been launched by Ukraine using drones to destroy Russian bomber planes, according to the Ukrainian security service.

Ukraine’s Security Service (SBU) has reportedly carried out a mass drone attack at four Russian airfields on 1 June. Referencing an SBU source, Ukrainian media have reported that "over 40" Russian strategic bombers have been hit in the areas considered to be "deep rear".

A Ukrainian security official on Sunday said that Kyiv destroyed more than 40 Russian aircraft in a drone attack that struck an airbase thousands of kilometres from the front lines. Russia uses the