Russian drones targeted civilian infrastructure, causing temporary power disruptions and damage to residential areas in one of the city's statostat districts, Acting Mayor Artem Kobzar said. Information on potential casualties is being verified.
The regional energy company Sumyoblenergo confirmed parts of Sumy were de-energized by the Russian attack. Hourly blackout schedules are also in effect.
The Air Force reported drone movement toward Sumy from the north at 3:12 p.m.
Russian forces launched 162 strike drones of various types at Ukraine overnight into Nov. 24. Air defenses downed 125 of them.
Ukrainian troops recorded hits from 37 strike drones at 15 locations, plus debris fallout at one site.
The assault caused the most damage to civilian infrastructure and private homes in the Kharkiv, Chernihiv and Dnipropetrovsk oblasts, according to the Air Force.