AMMAN (Reuters) - Islamic State militants on Saturday pushed back U.S.-backed forces trying to advance into their stronghold of Manbij for the first time since a major offensive to capture the city and cut off the militants' main strategic access route to Turkey, a monitoring group and Kurdish sources said.
The Syria Democratic Forces (SDF), comprised of Kurdish and Arab fighters and backed by the air power of a U.S.-led coalition to fight Islamic State and aided by U.S. special forces, have been involved in the month-long Manbij operation aimed to seal off their last stretch of Syrian-Turkish frontier.