FBI know the identity of Jihadi John
The FBI has claimed it has identified the suspected British Isis militant known as Jihadi John.
The fighter appeared to behead British aid worker David Haines, and two US journalists Steven Sotloff and James Foley, in three brutal videos released by the terrorist group calling itself the Islamic State (IS).
FBI Director James Comey said the agency would not yet name or reveal the nationality of the man who spoke in a London or south-east English accent in the videos.
Mr Comey did not address whether the US believes the man actually carried out the killings himself, as the beheadings are not shown in the videos.
Speaking at a briefing with US journalists, Mr Comey is reported to have said: "I believe that we have identified him, I'm not going to tell you who I believe it is."
Asked if he would prioritise capturing the jihadist, he said: "We will do, and expend the effort that I think the American people would want us to and expect us to," he said.
The British Home Office said it did not comment.
The announcement comes after UK Foreign Secretary Philip Hammond claimed yesterday that intelligence agencies are "getting warm" in identifying the alleged masked murderer.
The man is said to lead a small group of British jihadis who became known by hostages as "The Beatles".
Abdel-Majed Abdel Bary, 24, known as L Jinny or Lyricist Jinn, is one of the men believed to be under investigation, when he tweeted a picture of himself appearing to hold a severed head.
His father, Adel Abdul Bary, admitted terror charges including liasing with Osama bin Laden after becoming an al-Qaeda spokesman after the 1998 US embassy bombings at a court in New York on Friday.
Up to 500 British jihadists are believed to be fighting with Isis in Syria and Iraq