Protesters on Tuesday welcomed Vice President Biden to Serbia by calling for Donald TrumpDonald John TrumpNew Bob Woodward book will include details of 25 personal letters between Trump and Kim Jong Un On The Money: Pelosi, Mnuchin talk but make no progress on ending stalemate | Trump grabs 'third rail' of politics with payroll tax pause | Trump uses racist tropes to pitch fair housing repeal to 'suburban housewife' Biden commemorates anniversary of Charlottesville 'Unite the Right' rally: 'We are in a battle for the soul of our nation' MORE’s election.

“Vote for Trump, vote for Trump,” hundreds of demonstrators chanted in Belgrade, according to Reuters.

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Reuters said the demonstrators were Serbian ultranationalists protesting Biden’s one-day stop in Belgrade before his visit to Kosovo.

Demonstrators wore shirts displaying an image of Trump, the Republican presidential nominee, the news outlet added.

“Trump is the alternative to globalization,” Vojislav Seselj, head of Serbia’s ultra-nationalist Radical Party, told Reuters when asked about supporting Trump. "He will destroy old centers of power in the United States and he is a supporter of Russia.”

Biden voiced sympathy for Serbians who died during NATO's bombing of Serbia in 1999.

“I’d like to express my condolences to the families of those whose lives were lost in the wars of the 1990s, including those killed as a consequence of the NATO air strikes,” he said alongside Serbian Prime Minister Aleksandar Vucic.

Reuters said that Seselj's Radical Party is the third-largest political party in Serbia’s parliament.

Seselj on Tuesday urged Serbian-Americans to support Trump during America’s general presidential election.

Seselj was acquitted in March of war crimes by a United Nations tribunal in The Hague. He was accused of inciting ethnic hatred in the conflicts surrounding Yugoslavia’s dissolution into seven nations in the 1990s.

NATO conducted air strikes against Yugoslavia’s Serbian forces in 1999 to prevent ethnic violence against Albanians in Kosovo.

Kosovo declared its independence from Serbia in 2008, but its neighbor does not recognize its sovereignty.