QUETTA: At least four members of a family were killed, while one received injuries during a firing incident in Quetta on Friday. According to reports, unidentified armed men stormed into a house in Harnai area, and opened fire. As a result, four people were killed, while a woman was injured. Police rushed the bodies and the injured to a local hospital for medico-legal formalities and treatment. The police registered a case and started investigation. Sources said that the reason behind the killing could not be ascertained immediately.