Handwara, 22-Sep; A policeman, mistaken for a militant, was killed by his colleague late last evening in Jammu and Kashmir’s Kupwara district.Official sources said that a sentry after assuming an attack opened fire last night, leaving a policeman dead. They identified the cop as Ajay Dhar, son of Late Krishen Lal Dhar of Langate Handwara, saying that he was posted at Police Station Handwara.Reports said the policeman had headphones in his ears and despite loud calls by his colleague he did not respond which resulted in the guard at the temple firing at him.Meanwhile, Police has registered a case and initiated further investigation into the incident. (CNS)