(WARNING: GRAPHIC CONTENT) Islamic State militants fighting in Iraq and Syria release a video which purports to show the beheading of British aid worker David Haines. Rough Cut (no reporter narration).
**EDITORS PLEASE NOTE: THIS EDIT CONTAINS GRAPHIC / REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THE AUTHENTICITY OF THIS VIDEO** ROUGH CUT (NO REPORTER NARRATION) Islamic State militants fighting in Iraq and Syria released a video on Saturday which purported to show the beheading of British aid worker David Haines. Reuters could not immediately verify the footage. Two U.S. journalists, James Foley and Steven Sotloff, have been executed by Islamic State (IS). Haines, a 44-year-old father of two from Perth in Scotland, was kidnapped last year while working for the French agency ACTED.