Ukrainian President Volodymyr Zelensky thanked dozens of allies on social media, a day after US President Donald Trump and Vice President JD Vance accused him of not being grateful enough.

Zelensky tweeted, "Thank you for your support" in individual replies to some 30 messages of support from European leaders after his acrimonious clash with the new US administration at the White House.

Despite the confrontation, Zelensky earlier thanked Trump, the US Congress and the American people for their support and for his visit.

"Ukraine needs a just and lasting peace and that is what we are working for," he wrote.

Ukrainian Foreign Minister Andriy Sibikha also sent numerous thanks to his European counterparts on social media.

During the meeting at the White House, Vance asked Zelensky, "Did you say 'thank you' once... during this whole meeting?"

The planned press conference with Trump and Zelensky was then cancelled, and Zelensky was asked to leave.

Despite the confrontation, the Ukrainian president later told Fox News that he believed that "of course" relations with the United States could be repaired.

But he refused to apologize, saying, "I'm not sure we did anything wrong."

Still, Zelensky said he wished the exchange of remarks had not taken place in front of reporters.

Later, U.S. Secretary of State Marco Rubio on CNN called on Zelensky "to apologize for wasting our time." I BGNES and AFP