The Islamic State (IS) terror group has released a gruesome beheading video claiming to have filmed it in Afghanistan's Khurasan province, the media reported.The prisoner is shown wearing an orange jumpsuit and being paraded through a mountainous region before being beheaded, Khaama Press reported.A video was released by the Islamic Movement of Uzbekistan (IMU) terror group which purportedly shows its leader Usmon Ghazi and his fighters taking oath of allegiance to the IS terror group and its leader Abu Bakr al-Baghdadi.However, it is not yet clear on what charges the prisoner was executed. His identity is yet to be confirmed.