The governor of Russia’s Belgorod region said on Monday that “a sabotage and reconnaissance group” of the Ukrainian army had crossed into Russian territory.

Vyacheslav Gladkov said forces had entered the territory of the Graivoronsky district, which borders Ukraine.

“The armed forces of the Russian Federation, together with the border service, the National Guard and the FSB (Russia's security service), are taking the necessary measures to eliminate the enemy,” Gladkov said.

Earlier on Monday, Gladkov claimed on Telegram that the district had been shelled by Ukrainian forces since 9 a.m. local time (2 a.m. ET), but added that no one had been injured.

The villages of Antonovka, Kozinka and Gora-Podol had been hit by shells or debris, Gladkov said.