The UK's security and intelligence agencies are examining a video by Daesh to identify a man and young boy with British accents, the BBC reported Monday.

The video purportedly shows the killing of five men who Daesh says were spying for the UK.

The authorities will also be carrying out voice-print analysis to match what is heard against individuals known to have travelled to Iraq and Syria.

The man threatens attacks in the UK, during the 10-minute film.

He also says the footage, which has not been independently verified, is a message for Prime Minister David Cameron.

Source: MENA