European leaders on Saturday welcomed U.S. President Donald Trump's plans to meet with Russian President Vladimir Putin on ending the war in Ukraine, while stressing the need to keep pressure on Moscow and protect Ukrainian and European security interests.

Trump plans to meet Putin in Alaska on Friday, saying the parties, including Ukrainian President Volodymyr Zelenskyy, were close to a deal that could resolve the 3½ year conflict.

The U.S. president is open to a trilateral summit with Putin and Zelenskyy, but for now the White House is planning a bilateral meeting as requested by Putin, a White House official said. Russian and Ukrainian officials could not immediately be reached for comment on the prospects of a trilateral meeting.