Six coaches and the locomotive of the Kolkata-Sairang Express derailed near Digaru on the outskirts of Guwahati, Assam. Further details are awaited. 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. The train was travelling from Mizoram towards Kolkata when the accident occurred.