The Indian Express. The Kolkata-Sairang Express left Chitpur in Kolkata and was headed to Sairang, Aizawl, in Mizoram, when it derailed on the outskirts of Guwahati. Civic and transport authorities are coordinating field operations to improve commuter safety, reduce transit bottlenecks, and streamline daily travel across key urban corridors. Commuters have been advised to check updated schedules and route advisories.