(VOVworld) - The Islamic State threatened to attack Britain in an Internet video released on Sunday showing the killing of five alleged British spies.

An English-speaking Islamic State (IS) fighter, who threatened Britain in a video (Photo: telegraph.co.uk)

It said the five victims worked with the international coalition fighting IS in Iraq and Syria. In the footage, one of the gunmen, speaking in a British accent, said that this is a message to British Prime Minister David Cameron.

In a statement, the British Department of Foreign Affairs, stated that they are examining the content of the video.