US-backed Syrian rebels are suffering heavy casualties as they attempt to retake the Islamic State (IS) stronghold of Raqqa from fighters lodged in tunnels, trenches and other defensive positions, the Pentagon said today.
Despite stiff resistance from improvised explosive devices, car bombs and even drones, the Syrian Democratic Forces (SDF) have now entered the Old City of Raqqa, breaking through a seventh-century wall laden with explosives where IS has been holding out. The contingent of Arab and Kurdish soldiers number between 30,000 and 40,000.