"The activity of enemy sabotage and reconnaissance groups, which were trained under the guidance of Russian instructors, has intensified," the agency posted on Facebook.

Read alsoMilitants involve Russia's military to set "barrage" checkpoints – IntelThe intelligence department noted that a network of centers for training saboteurs was deployed both in the temporarily occupied territories and in the regions of the Russian Federation bordering Ukraine.

As UNIAN reported earlier, Ukrainian military in the ATO zone had spotted a sniper group of occupants and eliminated one of them.