Islamic militants are using violent video games with scenes of violence and killing to entice young men and women into their ranks.

The sophistication and money that Isis have spent on social media and PR has surprised many in the West. A new U.S-based research group, the Counter Extremism Project is soon to release to governments and media outlets a database of information about militants and their supporters.

The Counter Extremism Project believes that Isis is generating a great deal of wealth – it's thought to have stockpiled around £1billion - from shady deals with morally compromised companies.

Risk management group Maplecroft believes that Isis controls half a dozen oil fields in Syria and four in Iraq, with many officials convinced it's making millions from smuggling barrels to Turkey, Iran and Iraq.