KAMOKE:--At least three persons were killed in firing by an armed man on the ‘dera’ of a landlord here on Tuesday. Police said that gunman of local landlord Chaudhry Muhammad Khan Dhadi opened indiscriminate fire on the dera of the landlord, killing three persons on the spot and fled from the scene. The police shifted the dead bodies to local hospital for post-mortem and started further investigation. The reason behind the incident could not be ascertained yet.