As many as four women were killed and four others, including women and children, were injured in a grenade attack at a house in Khyber Agency on Tuesday. According to details, unidentified persons hurled a hand grenade inside a house in Malik Din Khel, a remote area of Khyber Agency. The explosion killed four women and injured four others, which included women and children. The injured were shifted to a hospital. Tribal officials and Khasadar force reached the scene after the attack however no arrests could be made until the filing of this report. Sources said that the attack was a result of tribal enmity.