Russia and Ukraine began a major prisoner exchange Friday, swapping hundreds of soldiers and civilians in the first phase of an exchange that was a moment of cooperation in otherwise failed efforts to reach a ceasefire in the 3-year-old war.

The announcement was made ahead of an expected prisoner exchange between Ukraine and Russia on Friday – an outcome of last week’s face-to-face talks in Turkey, the first time the two countries have held direct talks at any level in three years.