A Ukrainian drone attack killed a mother and her toddler in western Russia on Wednesday, local officials said, in a major overnight barrage that set an oil refinery ablaze and targeted a nuclear facility.

Russia’s air defences reportedly destroyed drones over nine regions, including 11 over Smolensk, which sits on the border with Belarus. Nearly half were hit over Kursk, where Ukrainian troops have occupied several villages for months following an incursion.

Drone strikes were reported across multiple Russian regions, including Nizhny Novgorod, Smolensk, Tver, and Bryansk, igniting fires and triggering air defence responses. While there were no reported casualties, an oil refinery in the city of Kstovo, Nizhny Novgorod, suffered significant damage.