Ukraine’s President Volodymyr Zelensky raised the stakes ahead of a potential meeting with Vladimir Putin in Turkey on Thursday by saying he wouldn’t hold talks with any Russian representative other than the president himself.

Putin hasn't yet said whether he will be at the talks, which Trump has urged Ukraine and Russia to attend as part of Washington's efforts to stop the fighting.

Putin had initially called for direct talks in Turkey's second city "without pre-conditions", before Zelensky announced that he would go in person and expected the Russian president to travel as well. The US is also expected to send a high-level delegation.