A dramatic new video has emerged, showing Ukrainian soldiers retreating from their positions in Kursk as Russian forces bomb a building that was previously occupied by the Ukrainian military. The footage captures the intensity of the assault,

Russian defence officials say its military has retaken three villages in the Kursk region, in what Ukraine is calling a major push to squeeze its troops out of Russia before U.S. president-elect Donald Trump takes office in the new year.

The tally differs sharply from estimates by U.S. officials and military analysts, who have said the number is closer to 70,000.