File photo: Vyacheslav Gladkov, governor of the Belgorod region convenes on January 24, 2023, with Russian President Vladimir Putin at the Kremlin to discuss the region s development. Photo courtesy of Kremlin.ru
"A sabotage and reconnaissance group of the Ukrainian armed forces" crossed into Russia's Belgorod region, governor Vyacheslav Gladkov said, adding that troops and the FSB security service were "taking the necessary measures to eliminate the enemy."
He said he would release more details later.
After Russian President Vladimir Putin sent troops to Ukraine in February 2022, the border region of Belgorod in the country's south has been repeatedly shelled, and dozens of people have been killed.
Authorities have also reported a series of incidents involving members of "sabotage" groups crossing over from Ukraine.
In April, the city of Belgorod was bombed by a Russian fighter jet which dropped ammunition over the city by accident.