The Ukrainian leader cast doubt on a meeting with Trump in Washington this week, and said he had several questions for the president.

Without confirming an agreement had been reached, the US president said in return for the deal Ukraine would get "the right to fight on".

President Trump, who had insisted he wanted “payback” for past military aid to Kyiv, suggested President Volodymyr Zelensky would visit Washington this week to sign an agreement, which he called a “very big deal.