Russian President Vladimir Putin called Friday for a "transitional administration" to be put in place in Ukraine and vowed his army would "finish off" Ukrainian troops, in hardline remarks as US President Donald Trump pushes for a ceasefire.

A rapprochement between Washington and Moscow since Trump's return to office and the US leader's threats to stop supporting Kyiv have bolstered Putin's confidence more than three years into an offensive that has killed tens of thousands on both sides.

Ukraine fears it could be forced to accept a final peace deal on terms that are favourable to Moscow if it loses the support of its most important backer.

The renewed call to essentially topple Ukrainian leader Volodymyr Zelensky was the latest demonstration of Putin's long-standing desire to install a more Moscow-friendly regime in Kyiv.

"We could, of course, discuss with the United States, even with European countries, and of course with our partners and friends, under the auspices of the UN, the possibility of establishing a transitional administration in Ukraine," Putin said on the sidelines of an Arctic forum.

"What for? To........

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