At least seven people, including two children, were killed by a Russian drone strike in the northeastern Ukrainian city of Kharkiv on Sunday night.

President Volodymyr Zelenskiy accused Russia of unleashing "cynical" attacks on Ukrainian civilians that he said were designed to undermine his talks with U.S. President Donald Trump in Washington later on Monday.

Hungary accused Ukraine of an "outrageous and unacceptable" attack that disabled a Russian oil pipeline supplying the NATO ally—and fired a warning to Kyiv about its reliance on Hungarian electricity supplies. Newsweek has contacted the Ukrainian foreign ministry for comment.

The president of Ukraine and his European allies are to visit the White House on Monday, after President Trump backed Russia’s plan to end the war.

Rubio laid responsibility on both Russia and Ukraine for refusing to make enough concessions for a ceasefire. “Both sides are going to have to give up something in order to get to the table, in order to make this happen. That’s — that’s just the way it is,” Rubio said.

Secretary of State Rubio said Trump's position on the war in Ukraine hasn't changed after Friday's summit with Putin and that Ukraine must be involved in peace talks.

Russia’s illegal seizure of the Crimean Peninsula from Ukraine in March 2014 was quick and bloodless, and it sent Moscow’s relations with the West into a downward spiral.