Clashes between U.S.-backed Syrian Kurdish fighters and militants continued for a fourth day Sunday near a prison in northeastern Syria that houses thousands of members of the Islamic State group, the Kurdish force said.
The standoff follows a bold assault by the extremists that breached the premises of Gweiran Prison, allowed an unknown number of militants to escape and killed dozens of U.S.-backed fighters who guard the facility.
The Kurdish forces said militants staged a new attack on the prison, also known as al-Sinaa prison, Sunday in an attempt to break the security cordon and support inmates who are still in control of parts of the prison, the largest facility in Syria housing IS militants.