NO REPORTER NARRATION<br/> <br />EDITORS PLEASE NOTE: CONTAINS GRAPHIC CONTENT<br/> <br />Islamic State militants fighting in Iraq and Syria claimed in a video posted online on Sunday that they had beheaded American hostage Peter Kassig.<br/> <br />The video did not show the beheading but showed a masked man standing with a decapitated head covered in blood lying at his feet. Speaking in English in a British accent, the man says: "This is Peter Edward Kassig, a U.S. citizen."<br/> <br />Reuters could not immediately verify the authenticity of the footage, which appeared on a jihadist website and on Twitter feeds used by Islamic State.<br/> <br />Kassig, a 26-year-old from Indiana, is also known as Abdul-Rahman, a name he took following his conversion to Islam while in captivity.<br/> <br />Kassig's parents have said through a spokesperson their son was taken captive on his way to the eastern Syrian city of Deir al-Zor on Oct. 1, 2013.<br/> <br />A former soldier, Kassig was doing humanitarian work through Special Emerge
