U.S. Secretary of State Marco Rubio will not attend crunch talks on a ceasefire for Ukraine in London on Wednesday, after Ukrainian President Volodymyr Zelensky doubled down on a refusal to recognize Russian control over Crimea as part of a future agreement.

US Secretary of State Marco Rubio will not attend talks in London on Wednesday aimed at working toward an end to Russia’s war in Ukraine, as Kyiv signaled it would reject a key detail of the Trump administration’s proposal to end the three-year conflict.

U.S. Secretary of State Marco Rubio will not attend talks in London aimed at ending the war in Ukraine, State Department spokesperson Tammy Bruce said on Tuesday, after earlier saying he planned to travel to London.

President Volodymyr Zelenskiy said on Tuesday Ukraine was ready for talks with Russia "in any format" once a ceasefire is set, while the Financial Times reported President Vladimir Putin had offered to halt Russia's invasion at the current front lines.

Russia and Ukraine blamed each other for breaking an Easter ceasefire announced by Vladimir Putin, with both sides accusing the other of carrying out attacks.