By Vladimir Soldatkin, Tom Balmforth and Huseyin HayatseverISTANBUL (Reuters) -Russia told Ukraine at peace talks on Monday that it would only agree to end the war if Kyiv gives up big new chunks of territory and accepts limits on the size of its army,

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.

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.