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. -snip- "We take the models and solutions proposed by the Americans very seriously, but we can't accept it all in its current...