Police and medics in Iraq say a series of car bombs across the capital killed at least 21 people on Tuesday.<br /><br />A wave in bombings has hit Baghdad in the last month, most claimed by fighters from the group calling itself Islamic State (ISIL).<br /><br />The group surged towards Baghdad in June after seizing the northern city of Mosul but have not captured the capital.<br /><br />Syrian Kurdish fighters have been battling an ISIL offensive near Turkey’s border with Syria since September. <br /><br />As ISIL continue their attack on multiple fronts, fighters from the group have released video footage showing they picked up arms air-dropped by the US destined to help the Kurds resist their advance.<br /><br />Boxes of grenades, weapons, ammunition and medical supplies have ended up in the hands of ISIL.<br /><br />Much of the air-dropped supplies did, in fact, reach the Syrian Kurdish fighters for whom it was destined.<br /><br />Meanwhile, Turkey, which has so far declined to take a frontline role in the battle against ISIL, said it was now helping Iraqi Kurdish fighters cross into Syria to support their brethren fighting in and around Kobani.<br /><br />Ankara views the Syrian Kurds with deep suspicion because of their ties to the PKK – a group that has been waging a decades-long militant campaign for Kurdish rights in Turkey.