Kameswar Sahu (40) and his son Sunil Sahu (12) died on the spot when the autorickshaw in which they were travelling was hit from the rear side by a passenger bus near Bhaliagada on Kolkata-Chennai highway on the outskirts of the city on Monday. Kameswar's wife Sakuntala Sahu was also among the seven injured in the accident. The injured were admitted in MKCG Medical college hospital.