European leaders urged US President Donald Trump on Wednesday not to strike a unilateral Ukraine peace deal with his Russian counterpart Vladimir Putin during their one-on-one meeting later this week in Alaska.

The two leaders will meet in the US state later for the first time in six years - but Ukraine's Zelensky has not been invited.

Donald Trump and Vladimir Putin hold talks in Alaska on Friday, with the U.S. president's hopes of sealing a ceasefire agreement on Ukraine uncertain but with a last gasp offer from Putin of a possible nuclear deal that could help both men save face.