US President Donald Trump on Sunday accused Ukraine again of lacking "gratitude" for Washington's support against Russia's invasion, as top US and Ukrainian representatives met in Geneva for talks on a proposal to halt the war.

"UKRAINE 'LEADERSHIP' HAS EXPRESSED ZERO GRATITUDE FOR OUR EFFORTS," Trump wrote on his Truth Social platform, also blasting European countries for not doing enough to stop the war, but offering no direct condemnation of Moscow.

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