CAIRO - Islamic State militants fighting in Iraq and Syria claimed in a video posted online on Sunday that they had beheaded American hostage Peter Kassig. 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 US citizen.' Reuters could not immediately verify the authenticity of the footage, which appeared on a jihadist website and on Twitter feeds used by Islamic State. The video also shows a number of other people being beheaded.