Hundreds of people who survived but were seriously injured after a devastating train crash in southern India are being treated at hospitals in the hope they will recover from the tragedy that killed more than 300 people.
Two passenger trains derailed on Friday night in the area, in one of the country's deadliest rail disasters in decades.
Today, officials said the crash was caused by an error in the electronic signalling system that led a train to wrongly change tracks and crash into a freight train.
