Donald Trump has clashed with Volodymyr Zelensky in a furious exchange at the White House, with the US president telling his Ukrainian counterpart to make a deal with Russia "or we are out".

The pair interrupted each other repeatedly in front of the media during what was supposed to be a prelude to the two leaders signing a minerals deal.

After relations first became strained over Trump's handling of Ukraine peace talks with Russia, the minerals agreement was supposed to be a stepping stone towards further security ties between the countries.

At one point, Trump told Zelensky he was not thankful enough for US military and political support, and that he was "gambling with World War Three".

Zelensky had earlier argued there should be "no compromises" with Russian President Vladimir Putin - but Trump said Kyiv would have to make concessions to reach a peace deal with Russia.

Russia launched a full-scale invasion of Ukraine in February 2022, and currently controls around 20% of Ukrainian territory.

But Zelensky was told by the Americans to leave before the deal could be signed.