Chittagong is cut off from the rest of the country by rail link after a rail bogie and six wheels of engines are derailed from the track. The accident took place at Nangalkot of Comilla district on Saturday at about 4.45 in the morning. None was injured. Railway Station Master of Nangalkot Md. Anwar Hossaian said, the Mohanagar Godhuli Express from Dhaka derailed near the station and stopped immediately on spot. Anwar Hossain suspected some sabotage behind the accident.