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.

CHERNIHIV REGION, Ukraine (AP) — An exchange of prisoners between Russia and Ukraine from their more than three-year war was underway Friday, a senior Ukrainian official said. The swap was not yet finished, according to the official, who spoke on condition of anonymity because he was not authorized to speak publicly.