ISIS mercenaries attacked the headquarters of the Internal Security Forces (ISF) in the Diriyah neighbourhood, west of Raqqa city, on Monday.

Internal Security Forces tightened security measures in the area and started an operation. According to reports from the ground, two mercenaries were killed in the operation, one of whom was wearing a suicide belt.

The ISF headquarters targeted by today's armed attack is located near a prison where ISIS mercenaries are held.