Ukraine’s capital Kyiv came under a large-scale Russian drone and missile attack overnight into Saturday, just hours after Russia and Ukraine began a major prisoner exchange.

The hourslong raids, involving hundreds of drones, were a reminder that any diplomatic resolution to the conflict remains far off.

Ukraine has secured the release of 307 Ukrainians from Russian captivity in the second phase of its largest prisoner exchange with Russia, President Volodymyr Zelensky announced on May 24.