More than 100,000 people are trapped in a small pocket in northern Syria, as clashes are ongoing between Islamic State and rebels, aid group Doctors Without Borders (MSF) warns.
Over the past week, more than 35,000 people have fled camps for displaced people which were taken over by Islamic State or which are close to frontlines, MSF says. They join those stranded by previous conflict.
The Turkish border remains largely shut with only some medical cases being allowed to cross. Some medical clinics in Azaz were forced to shut while those still open are under intense pressure, flooded with cases.
MSF was also critical of the European Union. "It is unacceptable that the current efforts of the EU are focused on how to return Syrian refugees to Turkey, instead of on how to assure safety and protection for those amassing at the Syrian-Turkish border."