Warsaw, Poland - The White House has denied speculation that President Joe Biden would visit Ukraine in the course of his trip to Europe over the coming days.

"The trip will be focused on continuing to rally the world in support of the Ukrainian people and against [Russian President Vladimir] Putin's invasion of Ukraine, but there are no plans to travel into Ukraine," Press Secretary Jen Psaki tweeted on Sunday.

Psaki later confirmed that Biden would visit Poland following meetings in Brussels.

The US ambassador to the UN, Linda Thomas-Greenfield, also told US television channel CNN that she was not aware of any discussions about a trip to Ukraine.

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She said that the US government had issued a warning to its citizens not to visit Ukraine, as it is "a country at war."

The White House said Biden would travel to Europe on Wednesday for his third trip to the continent since assuming office in January 2021.

On Thursday, he is scheduled to attend special summits of NATO, the EU and the G7 in Brussels.

On Friday, Biden will then travel to Warsaw to hold a bilateral meeting with Polish President Andrzej Duda, Psaki said.

"[Biden] will discuss how the United States, alongside our Allies and partners, is responding to the humanitarian and human rights crisis that Russia's unjustified and unprovoked war on Ukraine has created," she clarified.