Russia cannot accept U.S. proposals to end the war in Ukraine in their current form because they do not address problems Moscow regards as having caused the conflict, a senior Russian diplomat said, suggesting U.S.-Russia talks on the subject had stalled.

The comments by Deputy Foreign Minister Sergei Ryabkov suggest Moscow and Washington have so far been unable to bridge differences which President Vladimir Putin raised more than two weeks ago when he said U.S. proposals needed reworking.

That’s according to EU executive chief Ursula von der Leyen Tuesday. Although she said the bloc would prefer to negotiate a solution.

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They come as U.S. President Donald Trump appears to be growing increasingly impatient with what he has suggested might be foot-dragging over a wider deal by Moscow.

Trump in recent days has said he is “pissed off” with Putin and has spoken of imposing sanctions on countries that buy Russian oil if he feels Moscow is blocking a deal.

Ryabkov, a specialist in U.S.-Russia relations, said Moscow was not yet able to move forward with a deal however.

(Editor: Oloyede Oworu)