May 22 (Reuters) - The governor of Russia's Belgorod region said on Monday that a Ukrainian army 'sabotage group' had entered Russian territory in the Graivoron district, which borders Ukraine.
In a statement on Telegram, Vyacheslav Gladkov said that the Russian army, border guards, presidential guards and the FSB security service were taking measures to repel the incursion.
Earlier, the Telegram channel Baza, which is linked to Russia's security services, had published footage apparently showing a Ukrainian armoured vehicle advancing on the Graivoron border checkpoint.
Ukrainian media cited Ukrainian military intelligence as saying the Liberty of Russia Legion and the Russian Volunteer Corps, both consisting of Russian citizens, were behind the attack.
Earlier on Monday, the group released a video showing five heavily armed fighters: "We are Russians, like you.