Trump told reporters on Friday that he had a good call with Zelenskyy and restated his disappointment at a conversation with Russian President Vladimir Putin over what he said was Moscow's lack of willingness to work toward a ceasefire.

Ukrainian President Volodymyr Zelenskyy says he has discussed air defences with his US counterpart, agreeing to work on increasing Kyiv's capability to "defend the sky" as Russian attacks escalate.

Donald Trump is likely to hold crucial talks with counterpart Volodymyr Zelenskyy on halting support of US weapons to Ukraine, amid an ongoing war with Russia.