Trump's warning came following a Russian missile attack on a US factory in Ukraine, which injured at least 15 workers.

A week after Donald Trump applauded Vladimir Putin down the red carpet in Alaska, and days after an unprecedented summit of European leaders at the White House, the American president came crashing down to earth on Friday.

U.S. President Donald Trump renewed a threat to impose sanctions on Russia on Friday if there is no progress toward a peaceful settlement in Ukraine in two weeks, showing frustration at Moscow a week after his meeting with Russian President Vladimir Putin in Alaska.

Russia’s top diplomat said in an interview released on Friday that “there is no meeting planned” between President Vladimir V. Putin of Russia and President Volodymyr Zelensky of Ukraine. It was the Kremlin’s most direct declaration yet that a summit the White House suggested was imminent was nowhere close to materializing.