Donald Trump paused all military aid to Ukraine to pressure Volodymyr Zelensky to agree to a ceasefire with Russia.

The extraordinary move came after Mr Trump launched a fresh attack on the Ukrainian president, who he said “won’t be around very long” if he does not end the war soon.

It leaves Ukraine, which is already suffering from a weapons and manpower deficit, facing the prospect of scaling down operations when attrition rates on the front line are the highest since the war began.

A White House official said late on Monday night: “President [Trump] has been clear that he is focused on peace. We need our partners to be committed to that goal as well. We are pausing and reviewing our aid to ensure that it is contributing to a solution.”