ThePrint. 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. NFR General Manager Vivek Khare reaches accident site, passengers shifted to an alternative train after the. Kolkata–Sairang Express derails in Digaru near Guwahati. Several passengers injured, while Northeast Frontier Railway reports no.