Competing claims have emerged over a deadly attack on a boarding school in Sudzha, a city in Russia's Kursk region 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.

Kyiv and Moscow traded blame on Sunday for a strike on a school in a Ukrainian-occupied town in Russia's Kursk region, while Kyiv said new missile and drone attacks killed at least 18 people in Ukraine.