Russia and Ukraine have completed the first phase of what is expected to be the biggest prisoner exchange since the start of the war, with almost 800 people released on Friday.

Russia and Ukraine were set to take part in a major prisoner swap on Friday, described as the biggest since the start of the full-scale Russian invasion in 2022. Officials from both countries agreed to exchange 1,000 prisoners of war each, during otherwise fruitless peace negotiations in Istanbul a week ago.

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.