Bhopal: A 45-year-old doctor died after an unidentified vehicle allegedly hit his motorcycle in Madhya Pradesh's Maihar district on Saturday night. Police have launched an investigation to identify the vehicle and trace its driver. After receiving information about the incident, the doctor's family members reached the spot and took him to Civil Hospital, Maihar, for medical treatment. Since the vehicle has not yet been identified, police are examining available evidence from the accident location and nearby areas. Further action will be taken after the vehicle involved in the accident is traced and its driver is identified, officials said.