The exchange, reportedly brokered during peace talks in Turkey, saw 270 prisoners of war and 120 civilians from each side returned home.
U.S. President Donald Trump commented on the development via Truth Social, calling it a potential “something big” moment and congratulating both nations on the exchange.
Ukrainian President Volodymyr Zelensky confirmed the release of 390 Ukrainians in what he described as the “first stage” of the agreement.
However, it remains unclear whether the latest Russian assault will derail future phases of the swap, which are expected to continue through the weekend.