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".

Ukrainian officials say Russia has launched a major ballistic and cruise missile attack on regions across Ukraine

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

A massive Russian attack on Ukraine is underway. The Operational Command of the Armed Forces announced that standby pairs of fighter jets have been scrambled, and ground air defence and radar systems have reached the highest state of readiness.