Donald Trump is trying to arrange a meeting between Ukraine's president Volodymyr Zelensky and Russian president Vladimir Putin within the next two weeks, German chancellor Friedrich Merz said after talks at the White House.

Speaking at the weekend, US envoy Steve Witkoff said: ‘We were able to win the following concession: that the United States could offer article five-like protection, which is one of the real reasons why Ukraine wants to be in Nato.’

The Ukrainian president says Monday's talks have been "constructive" as European leaders repeat calls for a ceasefire.