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.

Russia’s military on Tuesday said it would retaliate against Ukraine after Kyiv attacked Russian regions by firing six US-made ATACMS ballistic missiles, six UK-made Storm Shadow cruise missiles and launching one of the biggest drone attacks to date.