New horrific ISIS video shows boy aged 10 shooting an'' Israeli spy'' at point blank range

Islamic State militants have released a sickening new video that purports to show a boy shooting dead a 19-year-old Israeli-Arab who was taken hostage by the terror group.

The film shows a man identified as Muhammad Said Ismail Musallam describing how he was sent by Israeli intelligence to infiltrate ISIS in Syria, where the group claim he was captured last year.

 Wearing an orange jumpsuit, the hostage is later kneeling at the feet of two uniformed militants, one of whom appears to be no older than 10, before being shot in the forehead at point-blank range. 

But while ISIS claim the child - described in the video as one of the 'cubs of the caliphate' - was the shooter, careful editing means it is impossible to tell whether he pulled the trigger.