Four persons were killed and four others were injured today in a road accident in the Raygarh district of Chhattisgarh. The deceased include a woman and a child. The injured have since been admitted to the district hospital. According to police sources, a speeding four wheeler carrying the victims nosedived into a roadside pond near Bayang in the wee hours of today. three persons were killed on the spot while the driver of the vehicle succumbed to his injuries in the hospital.