Ukraine's President, Volodymyr Zelensky, has said he had a "very constructive" phone call with Donald Trump's peace envoy, Steve Witkoff, and the US president's son-in-law, Jared Kushner, BBC reported.

Zelensky said they had discussed how to ensure that Russia stuck to any potential deal to end its war with Ukraine and that he was "determined" to continue working with the US. 

Ukrainian officials also joined the call from Miami, where they are in engaged in a third day of talks on US efforts to engineer a peace deal with Russia, according to BBC.