New Delhi, Oct 04 (ANI): Islamic State militants fighting in Iraq and Syria released a video which purported to show the beheading of a man identified as British citizen Alan Henning. The video showed a man in an orange jumpsuit kneeling in a landscape who was identified as Henning. The kneeling man in the video says, "Because of our parliament's decision to attack the Islamic State, I, as a member of the British public, will now pay the price for that decision,". A male voice then says, "The blood of David Haines was on your hands Cameron," in a reference to Britain's prime minister. "Alan Henning will also be slaughtered, but his blood is on the hands of the British parliament." Reacting on the same, Cameron vowed to bring the killers to justice.