Sitting upright, he is working the power levers, but nothing appears to be working as the Kolkata-Sairang Express continues to move forward until it crashes, derailing its five coaches, shows a dramatic video. The train, en route to Sairang near Mizoram's Aizawl from Kolkata, derailed near Digaru railway station in Kamrup (Metropolitan) district around 6.54 am, an official said.