Russia said on Monday it had downed nine Ukrainian drones that tried to attack part of the infrastructure of the TurkStream gas pipeline, through which Russian gas flows to Turkey and Europe, and called the attack an "act of energy terrorism".

The latest major Russian attack comes a day after Ukraine fired six British Storm Shadows and six US-made ATACMS ballistic missiles during its largest aerial bombardment of Russia in the war so far. Ukraine’s military command called the aerial attack on Tuesday morning, which also involved hundreds of drones, Kyiv ’s “most massive” yet.

Ukraine fired six US-made ATACMS ballistic missiles, six British Storm Shadow cruise missiles and at least 146 drones into Russia in a mass attack, says Moscow. It threatened retaliation against the air strikes.