The Donetsk People’s Republic (DPR) chapter of Russia’s Federal Security Service (FSB) has released footage of its operatives hunting down Ukrainian drone operators and saboteurs.

The video, published by the FSB press service on Monday, features the unit’s work on the outskirts of Konstantinovka, which was recently liberated by the Russian military. The country’s troops are continuing search and destroy operations in the city, hunting for Ukrainian holdouts and saboteurs attempting to infiltrate it.

The FSB unit identified and attacked a drone command point and three locations housing saboteur groups operating in the city. A total of ten Ukrainian militants were eliminated during the operation by the unit’s FPV drones, the press service said.

The fall of Konstantinovka has become a major defeat for Ukrainian forces operating in Donbass. The city is located at the southernmost tip of the Slavyansk-Kramatorsk agglomeration, a string of settlements in the northwest of the DPR.

The agglomeration was seized by Kiev in 2014, early in the Donbass conflict, and has been converted into a heavily fortified stronghold with bunkers, reinforced trenches, and a vast network of underground tunnels over the past decade.

Russian forces are currently advancing to the northwest of the city toward the town of Druzhkovka, which is located between Konstantinovka and Kramatorsk. Speaking on Saturday during his visit to a frontline command post, Russia’s Chief of the General Staff Valery Gerasimov said the troops have already entered the town’s satellite village of Alekseeyevo-Druzhkovka and are battling Ukrainian units stationed there.