Here are details of some of the deadliest rail accidents in recent decades in India, where a railway official said at least 275 people were killed in a train crash in eastern state of Odisha on Friday.
June 1981: At least 800 people are killed when seven rear coaches of an overcrowded passenger train are blown off the track and fall into a river during a cyclone.
July 1988: An express train leaves the rails and plunges into a monsoon-swollen lake near Quilon in southern India, killing at least 106 people.
August 1995 - At least 350 people are killed when two trains collide 200 km (125 miles) from Delhi.
August 1999 - Two trains collide near Calcutta, leading to the deaths of at least 285 people.
October 2005: Several coaches of a passenger train derail in southern Andhra Pradesh state, near Velugonda. At least 77 people are killed.
July 2011: Around 70 people are killed and over 300 injured when a mail train derails in Fatehpur.
November 2016: Some 146 people are killed and more than 200 injured when an express train derails in the northern state of Uttar Pradesh.
January 2017: At least 41 people are killed after several coaches of a passenger train go off the rails in southern Andhra Pradesh state.
October 2018: A commuter train runs through a crowd gathered on the tracks for a festival in northern India's Amritsar city, killing at least 59 people and injuring 57.
