Concern mounted Monday for the fate of tens of thousands of displaced Syrian civilians caught in the middle of a desperate fight in the countryside north of Aleppo.
Days of clashes between moderate and Islamist rebel factions and the Islamic State group, which has mounted a fierce offensive on two key border towns, imperils rebel resupplies from Turkey.
The battles have drawn in Turkish and U.S.-coalition warplanes and Kurdish militiamen from the People’s Protection Units (YPG) in a multisided fight in an area measuring only 25 by 55 kilometers.