Vladislav Shapsha, governor of the Kaluga region, which borders the Moscow region to its northeast, said a non-residential building in the region was on fire as result of Ukraine's drone attack. Reuters could not independently verify the reports. There was no immediate comment from Ukraine.

Drone attacks were launched on the Bryansk region in the south of Russia overnight as the Ukrainian port city of Odesa suffered widespread damage from Russian strikes. Russian air defences intercepted and destroyed a number of Ukrainian drones over the southern Bryansk region, the regional governor Alexander Bogomaz said early on Saturday morning.