Russia moved extra tanks, artillery and rocket systems to its southern Kursk region on Friday as it battled a shock incursion by Ukraine’s military, while Ukrainian forces posted a video purporting to show them in control of a town near the border. In new evidence of the damage inflicted in the Ukrainian counter-offensive, video posted on social media and verified by Reuters showed a convoy of about 15 burnt-out Russian military trucks spaced out along a highway in the Kursk region. Some contained dead bodies.