Coalition air strikes have not stopped the militant group from earning millions of dollars a week from its
Erbil refinery in Khabat. Isis controls about half a dozen oilfields and has tapped into trading networks across northern Iraq. Photograph: Anadolu Agency/Getty Images
Erbil refinery in Khabat. Isis controls about half a dozen oilfields and has tapped into trading networks across northern Iraq. Photograph: Anadolu Agency/Getty Images
Islamic State has consolidated its grip on oil supplies in Iraq and now presides over a sophisticated smuggling empire with illegal exports going to Turkey, Jordan and Iran, according to smugglers and Iraqi officials.