Image copyright IS video 
 
 Islamic State militants have released a video, featuring a man and young boy speaking with British accents, purportedly showing the killing of five men who it says were spying for the UK. 
 
 In the 10-minute film, the man threatens attacks in the UK and says this is a message for David Cameron. 
 
 A boy later appears in the video, which has not been independently verified, talking about killing "unbelievers". 
 
 The UK Foreign Office said it was examining the video's content. 
 
 'Extraordinary duress' 
 
 In the new video, the masked jihadi militant, who is holding a gun, mocks Mr Cameron for daring to "challenge the might" of the extremist group before he makes a threat to British people to "invade your land". 
 
 The five men, wearing jumpsuits, are seen purportedly being shot in the back of the head in a desert location, after making what is claimed to be their confessions. 
 
 But BBC World Service Middle East editor Alan Johnston says they appear to be "speaking under the most extraordinary duress" and "may be entirely innocent". 
 
 Media playback is unsupported on your device Media caption A section of audio taken from the 10-minute film, in which the man threatens attacks in the UK 
 
 One of the men says he had been asked to provide information about the location of IS militants, including two Britons, apparently to help target them with air strikes. 
 
 Some of the five men say that they are from Raqqa in Syria while another says he is from Benghazi, Libya, but none that they are from the UK. 
 
 After the apparent killings, the young boy, who seems to be aged around six or seven years old, is seen pointing into the distance, wearing military-style clothing. 
 
 IS has repeatedly used children in its propaganda videos. 
 
 Analysis 
 
 By Gordon Corera, BBC security correspondent 
 
 It is less than two months since British IS propagandist Mohammed Emwazi, the man known as Jihadi John, was killed by a drone strike in Syria. 
 
 This latest video by IS seems to show another man trying to take up his mantle. 
 
 The identity of the masked man is so far unknown but authorities will be trying to identify him and confirm if he is British. 
 
 Emwazi was killed after intelligence - most likely from informers - located him in a vehicle in Raqqa, Syria. 
 
 The fact that this latest video shows the killing of alleged spies indicates the extent to which IS is trying to track down those who might be providing information. 
 
 Children also regularly feature in IS propaganda videos and the brief appearance of a child - apparently with a British accent - at the end of the video will also most likely be of interest to the authorities. 
 
 Alan Johnston says the release of the video comes in the aftermath of a "major military setback for IS" after it recently lost control of much of the Iraqi city of Ramadi. 
 
 He adds: "It's possible this is aimed at distracting attention from that defeat - an effort to shock watching Westerners and shift their focus." 
 
 Following the death of Mohammed Emwazi, the Briton who became known as Jihadi John, this new video shows "something of a replacement" for him, says our correspondent. 
 
 "That masked militant becomes the new masked face of the Islamic State, at least for British viewers." 
 
 Jonathan Russell, head of policy at the Quilliam Foundation think tank, said it was "shocking" to hear British voices and to see a child in the video, but that both were being used "to reinforce the IS brand". 
 
 "These symbols are really reinforcing its terror - this is terrorism in its truest sense," he told the BBC News Channel. 
 
 "And what we've got to be very careful to do is not simply reinforce this terror but to debunk it and to say, look, it's projecting falsehoods, it's showing definitely not the reality on the ground in Iraq and Syria at the moment and it doesn't offer anything to potential recruits here in the West." ||||| Skip Ad x Embed x Share A new execution video released by the Islamic State features a familiar figure and threat. VPC 
 
 An image taken from a video published by the media branch of the Islamic State group in the Raqqa province on Jan. 3, 2016. The video purportedly shows an English-speaking fighter at an undisclosed location speaking to the camera before executing, along with four other jihadists, five men from the Syrian city of Raqqa. (Photo: AFP/Getty Images) 
 
 LONDON — The Islamic State released a new video purporting to show the killing of five hostages who the militant group said were spying for Britain in Syria. 
 
 In the footage released online Sunday, a masked man with a British accent calls British Prime Minister David Cameron a "slave of the White House," and "mule of the Jews." 
 
 "Only an imbecile would dare to wage war against a land where the law of Allah reigns supreme," he says. "The Islamic State, our country, is here to stay. And we will continue to wage jihad, break borders, and one day invade your land, where we will rule by the Shariah." 
 
 One hostage says he was asked to locate two British members of the extremist group, also known as ISIL or ISIS, and photograph a building being used by the militants as a courthouse. Britain began launching airstrikes against ISIL positions in Syria last month. France, Russia and the United States are also bombing militants in Syria. 
 
 One of the condemned men appeals to other so-called spies to turn themselves in, saying "the door to repentance is open." Another hostage says "Don't let them fool you like they fooled us." 
 
 The video, which cannot be independently verified by USA TODAY, then shows the hostages, wearing orange jumpsuits, being shot in the head by masked militants. 
 
 An English-speaking young boy wearing military-style clothes points into the distance and says: "We are going to go kill the kafir (unbelievers) over there." 
 
 The video bears similarities to previous ISIL execution videos featuring Mohammed Emwazi, a London-raised militant also known as "Jihadi John," who beheaded Western hostages. Emwazi was killed by a U.S. drone strike in Syria in November. 
 
 Some media are calling the militant in the latest video, who is holding a gun, "the new Jihadi John." 
 
 British Prime Minister David Cameron said: “It’s desperate stuff from an organization that really does do the most utterly despicable and ghastly acts and people can see that again today. 
 
 “But this is an organization that’s losing territory, it’s losing ground, it’s, I think, increasingly losing anybody’s sympathy, and this again shows what an appalling organization we’re up against.” 
 
 Britain's Foreign Office said it is aware of the video and is examining its content. 
 
 Tomorrow's Daily Telegraph front page: "Hunt for the new Jihadi John." pic.twitter.com/tR5SVbzm04 — The Telegraph (@Telegraph) January 3, 2016 
 
 Read or Share this story: http://usat.ly/1R6JOcG ||||| Intelligence agencies were hunting a new ‘Jihadi John’ after an Islamic extremist with a British accent murdered five men accused of spying for the UK. 
 
 In a video released on social media the masked gunman warned David Cameron that the West could never win in the war against Islamic State in Iraq and the Levant (Isil), while mocking the impact of RAF airstrikes . 
 
 In a further chilling twist, a young boy aged around four, and appearing to speak with a British accent , also appeared on screen, threatening to kill non-Muslims. 
 
 The victims were all shot in the head at point blank range after the well-spoken British sounding terrorist delivered his propaganda rant. 
 
 The sickening ten and a half minute video had echoes of those posted by the Isil terrorist dubbed Jihadi John, who was responsible for a string of murders including the beheading of British aid worker Alan Henning. 
 
 Mohamed Emwazi, dubbed Jihadi John, was killed in a drone strike in November 
 
 Jihadi John, who was later identified as 27-year-old Mohamed Emwazi from London, was killed in a US drone strike last November. 
 
 MI5 agents were urgently working to establish the identity of the new terrorist, amid concern that the video might signal the start of a new Isil propaganda campaign, which comes in the wake of the Britain’s decision to join coalition airstrikes against Isil targets in Syria. 
 
 A source in the Foreign Office said the propaganda video had likely been released to “divert attention away from Isil’s recent military failures in Iraq and its inability to look after the citizens in the areas it controls”. 
 
 As well as speaking with a London sounding accent, the terrorist made reference to the soldiers working being paid the minimum wage, further betraying his UK roots. 
 
 The video began with apparent confessions from the five Arabic men who were wearing orange prisoner style jumpsuits. 
 
 One of the men claimed to have passed information to the West about prominent Isil figures who were subsequently targeted by the coalition, including the group’s deputy leader Abu Muslim al-Turkmani, who was killed in a US drone strike last August. 
 
 Abu Muslim al-Turkmani was killed by coalition forces last August 
 
 The video then cut to a desert landscape where the victims were shown kneeling before five gunmen clad in camouflage clothing and black Isil masks. 
 
 Addressing his rant to Mr Cameron directly, the terrorist described him as a “slave of the White House” and “mule of the Jews”. 
 
 Clutching a semi-automatic pistol he mocked Mr Cameron, describing him as an “imbecile” for thinking RAF airstrikes could have any impact. 
 
 'Only an imbecile would dare to anger a people who love death the way you love your life' Islamic State 
 
 He said: “How strange it is that we find ourselves today hearing an insignificant leader like you challenge the might of the Islamic State. 
 
 “How strange it is that a leader of a small island threatens us with a handful of planes. One would have thought you would have learned the lessons of your pathetic master in Washington and his failed campaign against the Islamic State. 
 
 “But it seems that you just like your predecessors, Blair and Brown are just as arrogant and foolish. 
 
 “In fact David, you are more of an imbecile. Only an imbecile would dare to wage war against a land where the law of Allah reigns supreme and where the people live under the justice and security of Sharia. Only an imbecile would dare to anger a people who love death the way you love your life.” 
 
 Isil fighters in Raqqa 
 
 Then turning to a wider audience, the terrorist warned that one day Britain would be invaded with everyone forced to live under strict Sharia law. 
 
 He said: “All British government. All people of Britain, know that today your citizenship is under out feet and that the Islamic State, our country, is here to stay and we will continue to wage jihad, break borders and one day invade your land, when you will be ruled by Sharia. 
 
 “But those of you who wish to continue fighting under the banner of Cameron on the minimum wage, we say to you to ask yourself, do you really think your government will care about you when you come into our hands? 
 
 “Or will they abandon you as they have abandoned these spies and those who came before them, because you will lose this war as you lost in Iraq and Afghanistan. 
 
 “But this time when you lose your children will inherit your defeat and remember you as the fools who thought you could defeat the Islamic State.” 
 
 RAF Typhoons have been bombing Isil targets in Syria (Neil Bryden/MoD) 
 
 After then shouting Allahu Akbar, Arabic for God is great, he then opened fire on the victim at his feet shooting him in the back of the head. 
 
 The man slumped forward before the other gunmen all opened fire on their victims in a sickening killing spree. 
 
 After a brief montage featuring Isil slogans and music, the video cut to another desert landscape, where a young boy, thought to be aged around four addresses the camera. 
 
 Wearing a camouflage top and a black Isil headband the youngster appeared to speak with a British accent as he pointed to the distance and said: “We will kill the kuffar (non-believers) over there" as he points to the distance.” 
 
 While his accent was difficult to ascertain the decision to use the child in the video suggested a determination by the Isil propaganda machine to further shock and terrorise the West.
– An airstrike killed the Islamic State's "Jihadi John" last year, but a new ISIS spokesman with a British accent appears to have taken his place. The group released a video in which the masked man warns that ISIS will attack the UK in retaliation for Britain's support of the US-led coalition that's bombing Syria, reports USA Today. The video also purports to show five men from Syria and Libya, alleged spies for Britain, being executed with a gunshot to the head, reports the BBC. The Telegraph labels the militant the "new Jihadi John" in its headline and notes that the video has another "chilling twist": a young boy clad in military clothes warns in what sounds like a British accent that ISIS is going to kill non-Muslims. The video hasn't been authenticated yet. "Only an imbecile would dare to wage war against a land where the law of Allah reigns supreme," says the adult militant, addressing David Cameron. "The Islamic State, our country, is here to stay. And we will continue to wage jihad, break borders, and one day invade your land, where we will rule by the Shariah." He also calls Cameron a "slave of the White House" and a "mule of the Jews."