By Dan Peleschuk and Mark Trevelyan (Reuters) -Ukrainian President Volodymyr Zelenskiy won diplomatic backing from Europe and the NATO alliance on Sunday ahead of a Russia-U.S. summit this week where Kyiv fears President Vladimir Putin and President Donald Trump may try to dictate terms for ending the 3-1/2-year war.

European leaders are urgently trying to arrange a call with Donald Trump before his meeting with Vladimir Putin in Alaska on Friday, according to Bloomberg.

Putin Alaska summit while European Commission and NATO leaders emphasize any deal must protect Ukraine's long-term security interests.