Armed assailants gunned three persons including a woman over marriage, later Thursday night.
According to police, armed men of rival group who were in dispute with another group over marriage, barged into the house of a member of opponent group and opened indiscriminate firing at the sleeping residents.
As a result of firing, three persons including a woman died on the spot.
The attackers fled from the house.
The bodies were shifted to District Hospital Bannu for autopsy.
The police registered a case and started search for the murderers.