606 Amritsar, May 3 An inmate at the Central Jail identified as Sukhwant Singh, alias Sukha, was injured when three fellow prisoners attacked him inside a barrack over an old enmity on Sunday. The jail staff have recovered a sharp weapon and an iron rod from the accused. Bahadur Singh, Assistant Superintendent, Central Jail, said prisoners identified as Karanbir Singh, alias Baba; Arshpreet Singh and Satnam Singh attacked Sukhwant Singh in the jail leaving him seriously injured. He sustained serious head injury and therefore was rushed to the jail hospital for treatment. The jail medical officer on seeing his injury referred him to the Civil Hospital, where the victim is under treatment. He said during search, the jail staff found an iron piece and sharp-edged weapon from the accused.