Russia is threatening to reject President Donald Trump's Ukraine peace plan unless "key understandings" from his Alaska summit with President Putin are upheld.

The U.S.-backed 28-point peace plan to end the war in Ukraine, which became public last week, drew from a Russian-authored paper submitted to the Trump administration in October, according to three sources familiar with the matter.

Russia launched a wave of attacks on Ukraine on Tuesday, killing at least seven people in overnight strikes that hit city buildings and energy infrastructure, while a Ukrainian attack in southern Russia killed three people and damaged homes,

President Donald Trump says Ukraine and Russia are making progress in peace talks but called the conflict difficult to solve on Tuesday night.

Russia has received what the U.S. and Kyiv have called an "updated and refined peace framework" to end the war in Ukraine and will discuss it next week, the Kremlin confirmed on Friday.

Europe is considering seizing billions in Russian assets to support Ukraine, as proposed by U.S. President Donald Trump.

A U.S. official told NBC News that Ukraine "agreed to the peace deal” and was sorting out "minor details," though Kyiv hasn't publicly accepted any plan and the Kremlin said it was waiting to see any changes.

Russian forces are concentrated mainly in the southern part of Pokrovsk, while small groups are present across the entire urban area. The enemy is storming the Defense Forces' positions around the clock and is taking heavy losses,