While Russian forces have staged a successful counteroffensive in the border region of Kursk in the last week, their attacks in the eastern Ukrainian region of Donetsk have slowed to a halt. Ukrainians have begun launching counterattacks along that eastern line, particularly in Toretsk.

Putin said he was "for" a ceasefire but raised concerns and set out his own conditions, such as certain security guarantees. Ukrainian President Volodymyr Zelenskyy, meanwhile, has accused the Russian leader of obstructing peace and "prolonging" the war.

U.S. President Donald Trump said he would speak to Russia's Vladimir Putin on Tuesday morning about ending the Ukraine war, with territorial concessions by Kyiv and control of the Zaporizhzhia nuclear power plant likely to feature prominently in the talks.