A triple suicide bomb attack near a police head quaters in central Damascus has killed two people and injured six others . It’s the second bombing this month on the Syrian capital, claimed by self-styled Islamic State or ISIL which experts say is a response to its multiple defeats elsewhere.<br /><br />US-backed forces are said to be on the verge of ousting militants from the city of Raqqa – one of their last strong holds.<br /><br />Kurdish troops were are the forefront of the offensive which began in early June. Up to 400 militants are believed to remain in a small part of the city, among them foreign fighters who are expected to “fight to the end.”<br /><br />As the campaign to drive out Islamic State from westen Syria, eastwards to the Iraqi border continues, thousands of civilians are being displaced.<br /><br />Shelling and clashes have swelled refugee camps in Deir al-Zor province downriver from Raqqa.<br /><br />At one south of al-Hasaka organisers said over crowding and lack of services and tents was making life intolerable for around 27,000 people.<br />