US President Donald Trump suspended military aid to Ukraine on Monday, a White House official said, sharply escalating pressure on Kyiv to agree to peace negotiations with Russia.

The move comes just days after a stunning public clash between Ukrainian President Volodymyr Zelensky and Trump, who is seeking a rapid end to the war. 

Trump earlier on Monday had declined to rule out a pause when quizzed by reporters, but any disruption in the flow of US arms to the frontline would rapidly weaken Ukraine’s chance of beating back the Russian invasion.

“The President has been clear that he is focused on peace. We need our partners to be committed to that goal as well,” a White House official told AFP, speaking on condition of anonymity. 

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“We are pausing and reviewing our aid to ensure that it is contributing to a solution,” the official added. 

Trump on Monday also warned he would “not put up” much longer with Zelensky’s defiant stance, and said the Ukrainian leader should be “more appreciative” of US support.

Speaking at the White House, Trump said Zelensky “won’t be around very long” without a ceasefire deal with Moscow.

The pause has gone into effect immediately and affects hundreds of millions of dollars of weaponry in the process of being sent to Ukraine, the New York Times reported.

Zelensky for his part said Monday he was seeking for the war to end “as soon as possible.”

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The comment came after the Ukrainian president accused Russia, which invaded Ukraine in 2014 and greatly expanded the conflict in 2022, of not being serious about peace.

Zelensky insisted that tough security guarantees were the only way to end the conflict.

But Trump’s stance has upended US support for Ukraine, and Washington’s allies more broadly, and stoked concern about the United States pivoting to Russia.

European support

After weekend crisis talks in London, Britain and France are investigating how to propose a one-month truce “in the air, at sea and on energy infrastructure”, potentially backstopped by troops on the ground.

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Zelensky said discussions were still focusing on the “first steps,” adding: “An agreement on ending the war is very, very far away”, a comment that angered Trump.

Zelensky added in a video statement Monday that “real, honest peace” would only come with security guarantees for Ukraine, which agreed to denuclearize in 1994 only in exchange for protection provided by the United States and Britain.

“It was the lack of security guarantees for Ukraine eleven years ago that allowed Russia to start with the occupation of Crimea and the war in Donbas, then the lack of security guarantees allowed Russia to launch a full-scale invasion,” Zelensky said.

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