The Ukrainian army said four people were killed and dozens - many of them elderly - were injured in the town of Sudzha in the Kursk region, which has been under Ukrainian control

"At the time of the attack, dozens of local residents were inside the building preparing to evacuate," Ukraine's military said on Feb. 1, adding that nearly 95 people could be trapped under the rubble.

Russia has fired dozens of missiles and drones at Ukraine, killing 15 people, according to Ukrainian officials. The two countries also traded blame for a strike on a boarding school sheltering civilians in the Ukrainian-occupied town of Sudzha in Moscow's Kursk region, where Kyiv launched a major cross-border assault last August.