evidence: The Coromandel Express, which runs from Kolkata in West Bengal to Chennai in Tamil Nadu, was going about 80mph (130km/h) when it collided with a stationary freight train at about 7pm on Friday, causing it to derail. [...] Rajesh Kumar, the senior deputy commercial manager of South Eastern Railway, said the Coromandel Express had changed tracks, which led to the incident, and that the reason would be investigated. The death toll was expected to increase as more bodies were recovered from the wreckage and overturned carriages, said the state chief secretary, Pradeep Jena. More than 200 ambulances were called to the scene in Odisha’s Balasore district and 100 additional doctors, on top of 80 already there, had been mobilised, he added. About 850 people had been taken to hospital.