Train movement on two routes -- Dhaka-Chittagong and Dhaka-Sylhet --was disrupted for over three hours yesterday as a train derailed in Comilla Sadar Dakkhin upazila. Railway sources said, two wheels of a compartment of a Dhaka-bound container-laden train from Chittagong veered off the track near Bijoypur at about 11:30am, snapping rail communications between the capital and the two districts. However, no causality was reported. Train movement on the routes resumed at about 2:45pm as a relief train from Laksham rushed to the spot and rescued the derailed train.