UK security analyzes ISIS-video

london - The British Security Service and police are investigating a video of terrorist group Islamic State (ISIS) in which a possible British ISIS warrior shows. Is examining the authenticity of the video which will be executed five alleged spies in Britain.

In the video speak a child and an adult man with a British accent. The UK services try to find their identity, the BBC reported Monday. ISIS threatens in the video with attacks in the UK. The services comparing the way of speaking of the two alleged Brits with the voices of people who are known to have traveled to Syria or Iraq.

It would not be the first time that a Briton occurs in a video of ISIS. A well-known hangman of ISIS, known as Jihadi John, was also a Brit.