Hospitals workers say at least 19 people were killed all but one of them women when a car bomb exploded on the outskirts of a northern Syrian city.

DAMASCUS (Reuters) -A car bomb killed at least 15 people in the northern Syrian city of Manbij on Monday, the second attack there in three days and Syria's deadliest since Bashar al-Assad was toppled from power in December.

The blast, which detonated next to a truck carrying agricultural workers, underscored the challenges faced by the country’s interim president.