PESHAWAR - Old enmity claimed life of a ward boy of hospital when his rivals opened firing on him at Kohat road on Tuesday. A policeman was also killed in the incident. Registering FIR with police, one Abdul Nasir said the incident occurred due to old enmity when armed men shot dead his brother Irfan. He said a police constable Mohammad Ali was also killed as a result of indiscriminate firing by the rivals.