Russia and Ukraine give brightest assessment yet of progress in talks on war

Russian and Ukrainian officials gave their most upbeat assessments yet on Sunday of progress in their talks on the war in Ukraine, suggesting there could be positive results within days.

Separately, U.S. Deputy Secretary of State Wendy Sherman said Russia was showing signs of willingness to engage in substantive negotiations about ending a conflict in which thousands have died. More than 2.5 million people have fled.

Ukraine has said it is willing to negotiate, but not to surrender or accept any ultimatums.

"We will not concede in principle on any positions. Russia now understands this. Russia is already beginning to talk constructively," Ukrainian negotiator and presidential adviser Mykhailo Podolyak said in a video posted online.

"I think that we will achieve some results literally in a matter of days," he said.