Videos from the Ukrainian unit tasked with interacting with the Russians in Kursk give a unique window into the 6-month-old occupation.

Competing claims emerged over a deadly attack on a boarding school in Sudzha, a city in Russia’s Kursk region that has been under Ukrainian control for five months, with Ukraine and Russia accusing each other of carrying out the strike.

The Ukrainian army said four people were killed and dozens - many of them elderly - were injured in the town of Sudzha in the Kursk region, which has been under Ukrainian control for five months. More than 80 people are reported to have been rescued from the building.