Railway traffic was suspended when the engine of a Karachi bound goods train derailed late Tuesday night near Bandhi station some 45 kilometers off here. As a result both up and down track remained block for some time. The up Khyber Mail was detained at Daur Railway station and was allowed to resume journey in the morning after the re-railing and track repair. The passengers travelling through Khyber Mail held demonstration for three hours at Daur station and blocked the track.