U.S. President Donald Trump says he has called Russian President Vladimir Putin and begun to arrange a meeting between Putin and Ukrainian President Volodymyr Zelenskyy, a critical step toward bringing a possible end to Russia's war on Ukraine.

The fast-moving developments in Trump's near-back-to-back summits with the heads of Russia, Ukraine and European powers have highlighted a pair of repeated sticking points.

U.S. President Donald Trump told President Volodymyr Zelenskiy on Monday that the United States would help guarantee Ukraine's security in any deal to end Russia's war there, though the extent of any assistance was not immediately clear.

President Trump and European leaders met for a one-of-a-kind summit at the White House on Monday to push toward a peace deal between Russia and Ukraine. But by the end of a marathon day of meetings, details on what such an agreement might entail remained elusive.

President Trump has offered only vague assurances of security guarantees for Ukraine if President Volodymyr Zelensky agrees to cut a deal with Russia.

A troop of European leaders will support Volodymyr Zelenskyy on Monday as the American president fueled new alarm among Ukraine's allies after his summit with Vladimir Putin.

Russian President Vladimir Putin and U.S. President Donald Trump discussed the idea of "raising the level of representatives" at Ukraine talks in a 40-minute call following the U.S. leader's meeting with Ukrainian President Volodymyr Zelenskiy,

An overnight Russian attack that rocked the central Ukrainian city of Kremenchuk and left hundreds of customers in the Poltava region without power shows that Russian President Vladimir Putin does not want peace,