Large Prisoner Exchange: 1,000 Ukrainian, 1,000 Russian POWs Returned — Istanbul Agreement

Beginning May 23, 2026, Ukraine and Russia executed the largest prisoner of war exchange since the Istanbul talks of May 16, 2026 — 1,000 prisoners returned to each side. The exchange was one concrete outcome of the failed Istanbul negotiations, where delegations met but could not agree on a ceasefire, as Russia demanded Ukraine withdraw from all four 'annexed' oblasts (including areas Russia does not control). The Istanbul talks collapsed on the territorial issue. Vatican offered to host follow-on talks after Istanbul failed; Russia rejected the offer, with Foreign Minister Lavrov calling it 'unrealistic' and 'a bit vulgar.' The exchange proceeded separately from the failed peace track. For context: the prior Trump-brokered 3-day ceasefire (May 9–11) had also included a prisoner swap component, but full-scale fighting resumed immediately after the 72-hour pause. Russia's May 24 mass attack on Kyiv — launching 600 drones and 90 missiles including an Oreshnik IRBM the night the prisoner exchange began — underscored the collapse of the diplomatic track.