A recent video posted online by ISIS militants shows a masked man with a decapitated head covered in blood lying at his feet. ISIS terrorists who are fighting in Iraq and Syria have claimed in the video that they had decapitated American hostage Peter Kassig. The act of beheading is not shown in the video but a masked man can be seen with a decapitated head covered in blood lying at his feet. "This is Peter Edward Kassig, a US citizen," the man says in English, with a thick British accent. Reuters news agency, while reporting the beheading, said it cannot confirm whether the footage is authentic or not. The video, which appeared on a terrorist website and on ISIS' Twitter account, shows a number of other people being beheaded.