KYIV, Ukraine, Nov 9, 2024 (BSS/AFP) - EU foreign policy chief Josep Borrell arrived Saturday in Kyiv to reassure Ukraine of Europe's backing in the first visit by a top Brussels official after Donald Trump's poll win.

The volatile Republican's victory in the United States election has set nerves jangling in Ukraine and Europe that Trump could end Washington's support for Kyiv's fight against Russia's invasion.

"The message is a clear one -- the Europeans will continue to support Ukraine," Borrell, who is set to leave office next month, told an AFP journalist accompanying him.

"We have been supporting Ukraine since the beginning, and on this my last visit to Ukraine, I convey the same message, we will support you as much as we can."

On the campaign trail, Trump cast doubt on maintaining the vast US military and financial aid to Ukraine and said he could cut a quick deal to end the war.

"Nobody knows exactly what the new administration is going to do," Borrell said, pointing out that incumbent Joe Biden still has two months in power to make decisions.

"But we Europeans have to use this opportunity in order to build a stronger and united Europe, and one of the manifestations of being united and being stronger and able to act is our role in supporting Ukraine."

Europe together has spent around $125 billion on supporting Ukraine since Russia's 2022 invasion, while the United States alone has coughed up more than $90 billion, according to a tracker from the Kiel Institute.

Keeping the US, Ukraine's single biggest donor, on board is seen by most as key for ensuring Kyiv stays afloat, especially at a time of political uncertainty in major European powers Germany and France.

On the battlefield, Ukraine's fatigued troops are struggling to stave off Russia's advances as they approach three years of full-scale combat.

Borrell, who will meet top Ukrainian officials on his visit, said it was up to EU countries to decide "when and how to increase" their support if needed.

But he said that at a meeting of EU leaders in Budapest Friday "most of the member states were insisting on the same line, continue supporting Ukraine."