The Islamic State advanced against rival insurgents in northern Syria on Sunday, capturing areas close to a border crossing with Turkey and threatening their supply route to the city of Aleppo, fighters and a group monitoring the war said. The Islamic State captured the town of Soran Azaz and two nearby villages, giving it the ability to move along a road leading north to the Bab al-Salam crossing between the Syrian province of Aleppo and the Turkish province of Kilis, according to the Syrian Observatory for Human Rights, a monitoring group based in Britain that tracks the war through a network of contacts in Syria. The loss of Soran Azaz is a blow to northern rebels in the Levant Front because it sits on an important weapons supply route, two alliance fighters said. “The main supply line between Turkey and Aleppo will be severely affected,” Abu […]