(CNN) — President Donald Trump’s working lunch with his Ukrainian counterpart Volodymyr Zelensky on Friday turned acrimonious when the US leader insisted Ukraine make territorial concessions to Russia to end the war, according to European officials briefed on the meeting.

Trump, who would later endorse a freeze in current battle lines as part of a peace settlement, grew frustrated and raised his voice multiple times, the officials said.

The episode was the latest chapter in the fraught relationship between the two men, and amounted to another shift in Trump’s approach to how the war will be settled. Last month, after meeting Zelensky in New York, Trump claimed Ukraine might be able to regain all its territory lost to Russia. But now Trump is preparing for another high-stakes meeting

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