A major train accident was reported in Assam this morning after seven coaches of the Kolkata-Sairang Express derailed near Digaru, on the outskirts of Guwahati. According to preliminary. Six coaches and the locomotive of the Kolkata-Sairang Express derailed near Digaru on the outskirts of Guwahati, Assam. Kolkata–Sairang Express derails in Digaru near Guwahati. Several passengers injured, while Northeast Frontier Railway reports no.