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.

Ukraine accused Russia on Saturday of killing four people in a strike on a boarding school sheltering civilians in the Kursk region town of Sudzha, which Kyiv has occupied for over five months. Kyiv launched a surprise cross-border offensive into Russia's Kursk region last August,