Islamist fighter identified as Nasser Muthan, centre, from Britain
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UK Syria fighters pose long-term threat - Met officer

22 June 2014 Last updated at 22:36 BST

UK police will have to deal with the threat of British fighters returning from Syria for "many years", a top Scotland Yard officer has told the BBC.

Met Assistant Commissioner Cressida Dick said the conflict represented a "long-term" terrorist threat.

Her comments came after an apparent internet recruitment video for jihadists in Syria and Iraq featured several Britons.

Frank Gardner reports.