An attack on a civilian bus in northern Syria yesterday killed 13 people, including 11 soldiers, and wounded three troops. <br />''<br />''<span style="color: #222222;"> According to state news agency, SANA, the attack occurred in the province of Raqqa, which was once controlled by the extremist Islamic State group. 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.</span><br />