Six coaches and the engine of the Sairang-Kolkata Express derailed near Digaru railway station in Kamrup (Metropolitan) district on Wednesday morning. Officials said several passengers were feared injured and rescue operations were under way. Guwahati: Six coaches and the engine of the Sairang-Kolkata Express derailed at Digaru near Guwahati in Assam on Wednesday morning, officials said. There were no reports of fatalities so far, but several passengers were feared injured, they said.