The governor of Russia’s Belgorod region, Vyacheslav Gladkov, says a Ukrainian army “sabotage group” has entered Russian territory in the Graivoron district, which borders Ukraine.

“The armed forces of the Russian Federation, together with the Border Service, the National Guard and the FSB [Federal Security Service], are taking the necessary measures to eliminate the enemy,” he said in a statement on Telegram.

According to Reuters, Telegram channel Baza, which is linked to Russia’s security services, published footage that it said showed a Ukrainian tank attacking a Russian border post.