An attack on a civilian bus in northern Syria on Monday killed 13 people, including 11 soldiers, and wounded three troops, Syrian state media reported, quoting an unnamed military official.

According to state news agency, SANA, the attack occurred in the province of Raqqa, which was once controlled by the extremist Islamic State group. The report did not say whether the bus was ambushed and attacked with machinegun fire, or whether it was hit by a missile or a roadside bomb.

There was no immediate claim of responsibility but the attack had all the hallmarks of IS militants who have carried out similar attacks over the past months, leaving dozens dead or wounded

Source: National News Agency