By Andrew Osborn and Darya Korsunskaya

MOSCOW (Reuters) -Donald Trump and Vladimir Putin hold talks in Alaska on Friday, focused on the U.S. president's push to seal a ceasefire deal on Ukraine but with a last-gasp offer from Putin of a possible face-saving nuclear accord on the table too.

The meeting of the Russian and U.S. leaders at a Cold War-era air force base in Alaska will be their first face-to-face talks since Trump returned to the White House. Ukrainian President Volodymyr Zelenskiy, who was not invited to the talks, and his European allies fear Trump might sell Kyiv out and try to force it into territorial concessions.

Trump is pressing for a truce in the 3-1/2-year-old war that would bolster his credentials as a global peacemaker worthy of the Nobel Peace Prize.

For Putin,

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