Leaders from Europe and Canada have held talks on U.S.-led peace efforts to end the war between Russia and Ukraine.

Ukrainian President Volodymyr Zelenskyy calls alleged drone attack on Russian President Vladimir Putin's residence a "complete fabrication" as tensions escalate between Ukraine and Russia.

Ukrainian President Volodymyr Zelensky talks battle lines, a corruption scandal distracting the war effort, and more in an exclusive interview with FOX News host Bret Baier on "Special Report." BRET BAIER,

Follow live updates from NBC News as Russian President Vladimir Putin speaks at his annual year-end news conference on Ukraine, peace, war and Trump.

Ukraine's largest private energy company reports 90% of generation capacity damaged by Russian attacks, leaving over 1 million without power during freezing temperatures.

Ukraine Strikes Airbase Deep Inside Russia. On Dec. 21, Ukrainian intelligence announced it conducted a major strike on a Russian airbase near

Off the battlefield, each side is trying to influence President Trump’s perception of the military conflict as they look to negotiate a peace settlement in their favor.

Russia attacked Ukraine with hundreds of drones ahead of talks between Ukrainian President Volodymyr Zelenskyy and U.S. President Donald Trump.

On December 19th, Russian forces launched air strikes with guided aerial bombs on the Ukrainian city of Zaporizhzhia, injuring at least six civilians and damaging a residential area, according to the local authorities.

Trump and Russian President Vladimir Putin spoke by phone shortly before the meeting. Trump described it as a “good and very productive telephone call.”

The Kremlin accused Ukraine of attacking a Russian presidential residence, an allegation that Kyiv said was baseless and intended to prolong the conflict.