The locomotive and five coaches of the Kolkata-Sairang Express derailed at Digaru station in Assam around 6.54am on Wednesday.
A video purportedly recorded inside the locomotive captures the driver saying the signal was red and the emergency system was not working; the footage has not been independently verified.
Northeast Frontier Railway said the locomotive pilot could not control the train’s speed as it was being received at the station to give precedence to another train.
