At the height of the campaign, Ukrainian forces controlled some 500 square miles of Russian territory. Now they hold just a small sliver of land along the border.

President Zelenskiy said his troops in Kursk were not surrounded, but said there might be a new Russian attack on Ukraine's northeastern Sumy region.

President Volodymyr Zelensky said that Ukrainian troops have not been encircled by Russian forces in Kursk region, accusing Russian leader Vladimir Putin of “lying” about the situation on the ground.