Of course this will come as a surprise to exactly zero people.

Via Daily Mail:

Security services are ‘monitoring very closely’ concerns that hundreds of British Muslims have signed up with extreme jihadist group ISIS and gone to fight in Iraq.

The Government believes more than 500 British citizens have left the UK and gone to join rebel fighters in Syria, with many of them feared to have crossed the border to join the uprising in Iraq.

The ruthless ISIS (Islamic State in Iraq and Syria) extremists control large areas of land in Syria and are now turning their attention to Iraq and particularly Baghdad, having already taken the cities of Mosul and Tikrit.

Meanwhile, British security experts are also looking at the possiblity that home-grown extremists trained by the ultra-violent group may bring terror back to the UK.

One terror expert told MailOnline today: ‘There is a fairly high chance that someone will attempt it.’

More than 500 British Muslims are believed to have already travelled to Syria to fight against President Assad, and it is feared many more will join them. Many of them are now feared to have crossed the barely-existent border into Iraq with the ultra-violent ISIS militia.