Donald Tusk, the Polish president, has claimed Russia has planned terror attacks in the air against Poland and other countries. Meanwhile, Donald Trump's advisers have conceded that a peace deal will likely take months - after the president-elect claimed he could end the war on "day one".

Russia launched a large-scale missile attack on Wednesday, some slamming into energy facilities that caused power losses in several regions of the country, officials said.

Ukrainian President Volodymyr Zelenskyy warned allies that the defense of his nation is a litmus test for broader Western resolve.

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

The Russian missiles sought out targets from the Lviv region in western Ukraine near Poland to Kharkiv in northeast Ukraine bordering Russia. The state energy company Ukrenergo reported emergency power outages in six regions. It often shuts down production during attacks as a precaution.

NATO member Poland scrambled fighter jets after overnight Russian missile and drone attacks on Ukraine, Warsaw's military said on Wednesday. Newsweek has reached out to Polish authorities and Russia's Defense Ministry for comment via email.

Ukraine introduced emergency power cuts in six regions amid what authorities described as a "massive" Russian missile strike, the national grid operator said on Wednesday.

On the night of 13-14 January, the Ukrainian defence forces conducted a massive attack on the Russian military facilities at a distance of 200 to 1,100 km deep in Russia. Source: General Staff of the Armed Forces of Ukraine Details: Targets in Bryansk,

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".