Nigeria, March 1 -- US President Donald Trump and his deputy, JD Vance, have accused the Ukrainian President, Volodymyr Zelensky, of being "disrespectful and ungrateful" following unsuccessful discussions at the White House on Friday.

The US leaders said this on Friday during a press conference with Mr Zelensky at the US Oval Office.

The Ukrainian president had visited the White House to discuss his country's ongoing war with Russia and finalise a "critical mineral deal" with the US.

The meeting began with Mr Trump praising Mr Zelensky and Ukrainian soldiers, but it switched into a heated conversation, with Messrs Trump and Vance raising their voices at Mr Zelensky.

Tension began after Mr Vance said the US was exploring diplomacy as a...