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".

Ukraine is suspected for another attack on major Russian pipeline infrastructure. After mysterious explosions hit the Nord Stream 1 and Nord Stream 2 pipelines near Denmark in September 2022, the American Central Intelligence Agency (CIA) allegedly told Belgian secret services that Ukraine could be responsible.

The textbook series was edited by Vladimir Medinsky, an adviser to Putin who was once involved in peace negotiations with Ukraine soon after the war broke out. Those peace talks e