A second round of peace talks between Russia and Ukraine have ended without a major breakthrough, and only an agreement between the warring sides to swap more prisoners of war. The Ukrainian negotiators said Russia again rejected an "unconditional ceasefire" - a key demand by Kyiv and its allies in Europe and the US.

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So, Russia and Ukraine are still as far apart as ever, with the two warring countries unable to make a significant breakthrough in direct talks in Istanbul.