Four people, including two women and a child, were killed and 15 others injured in an accident near Kot Sarwar Interchange, 25 km from here, on Thursday. According to police, a bus was on its way to Islamabad when trailer hit it near Kot Sarwar Interchange and it overturned. As a result, four passengers, including two women and a child, died on the spot while 15 others were injured and shifted to different hospitals. The victims have not yet been identified.