article_snippet: An MI5 agent was allegedly recruited by a terrorist mastermind in Syria and sent back to Britain in a plot to launch a devastating attack against An MI5 agent handlers.
article_snippet: An MI5 agent was recruited by MI5 as an undercover informant within the radical Islamic community and the man then travelled to Syria where the man became part of a jihadist group.
article_snippet: The revelations come as the terror threat in the UK continues to be 'severe' but as MI5 faces difficult questions about MI5 tactic of recruiting agents who are known Islamic extremists.
article_snippet: Supporters of Mohammed Emwazi, the Islamic State executioner known as Jihadi John, have claimed that MI5 harassed he and similar allegations have been made by the family of Michael Adebolajo, one of the killers of Fusilier Lee Rigby.
article_snippet: However, The Mail on Sunday can disclose that the man worked for MI5 for a period before the man decided to travel abroad in 2012.
article_snippet: MI5 faces difficult questions about MI5 tactic of recruiting agents who are known terrorists, while supporters of Mohammed Emwazi (pictured) have claimed that MI5 harassed the man .
article_snippet: Back in Britain, information suggested the man began plotting to attack the MI5 handlers who had recruited the man and set about trying to buy automatic weapons in Britain or abroad.
article_snippet: MI5 were sufficiently concerned by an intercepted communication MI5 received that MI5 launched an emergency operation to apprehend the man.
article_snippet: Some details of how MI5 go about recruitment have been released in recent months as part of an investigation by the parliamentary Intelligence and Security Committee.
highlights_snippet: An MI5 agent was allegedly recruited by a terrorist mastermind in Syria .
  
highlights_snippet: An MI5 agent was then sent back to Britain in a plot to launch an attack against MI5 .
  