At least 14 people were killed and 70 wounded in a car bombing on Sunday near a field hospital in a Syrian town on the border with Turkey that serves as a main supply line for rebels fighting President Bashar al-Assad, activists said.

The attack shattered relative calm in a region of far northern Syria that has been a safe haven for thousands of refugees fleeing the three-year civil war.

The bomb exploded in the town of Atmeh, situated amid olive groves opposite the Turkish village of Bukulmez in the province of Hatay. The target was a hospital owned by Ghassan Abboud, a pro-opposition businessman who owns Orient Television.