Volunteer and Advisor to Ukrainian President Yuriy Biriukov said that an army operation had been launched in the Anti-Terrorist Operation (ATO) zone to find and destroy sabotage and reconnaissance groups.

"For the record: an army operation has been launched in the ATO zone to find and destroy sabotage and reconnaissance groups. All over the ATO zone, do not look for 'gaps.' Thousands of troops and hundreds of vehicles," he wrote on his Facebook page on Friday.

He said that the best forces of the Ukrainian Armed Forces are involved in the operation.