US and British intelligence services have pooled resources in their hunt for the Islamic State fighter who murdered journalist James Foley.
Reports claim the hooded figure was one of three British men guarding foreign hostages - a group dubbed 'The Beatles'.
Warning: ITV News Correspondent Juliet Bremner's report contains images you may find distressing.
A British family have told ITV News of their devastation after discovering a close relative is fighting with the Islamic State in Iraq.
A French journalist who was held hostage with James Foley in Syria has told ITV News it was "devastating" to see his murder.