A Ukrainian-born, pro-Russian military blogger, said Russian special forces walked miles along the inside of a gas pipeline before surprising Ukrainian forces from the rear.

Russian special forces crawled inside a gas pipeline to strike Ukrainian units from the rear in the Kursk region, Ukraine’s military has said. View on euronews

Ukraine's armed forces shared footage late on Saturday that it said showed its soldiers attacking elite Russian forces "moving along a gas pipeline branch in an atttempt to gain a foothold" near Sudzha, about 6 miles from the Ukrainian border.