"A masked, black-clad militant, who has been identified by the Washington Post newspaper as a Britain named Mohammed Emwazi, brandishes a knife in this still image from a 2014 video obtained from SITE Intel Group February 26, 2015. Investigators believe that the masked killer known as ""Jihadi John"", who fronted Islamic State beheading videos, is Emwazi, two U.S. government sources said on Thursday. The British government and police refused to confirm or deny his identity, which was first revealed by the Washington Post, saying it was an ongoing security investigation. 27 February 2015. Please byline: Supplied by Vantage News Vantage News does not claim any copyright or licence in the attached material any  downloading fees charged by Vantage News are for Vantage News services only, and do not, nor are they intended to, convey to the user any copyright or licence in the material. By publishing the material, the user expressly agrees to indemnify and to hold Vantage News harmless from an"
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