A wounded victim sits next to a body covered with a blanket after a train crashed near Santiago de Compostela, northwestern Spain, July 24, 2013.
Investigators are trying to determine what caused a train in northern Spain to jump the tracks, killing 77 people and injuring more than 140.
The derailment Wednesday near a station outside the ancient city of Santiago de Compostela is Spain's deadliest train crash since 1972 when a train collided with a bus in southern Spain, killing 80 people.
Emergency workers worked through the night to rescue survivors. Television footage showed smoke rising from the wreckage and bodies covered by blankets alongside the tracks next to the twisted metal of the train's eight cars.
Rescue teams used cranes Thursday to move the carriages from the scene of the derailment.
Spanish Prime Minister Mariano Rajoy, who was born in Santiago de Compostela, has arrived in his hometown to survey the crash site.
Officials in Santiago de Compostela have cancelled ceremonies planned for Thursday, when Christian pilgrims from around the the world converge on the city to celebrate an annual festival honoring Saint James, the disciple of Jesus, whose remains are said to rest in a shrine.
The region of Galicia where Santiago de Compostela is located has declared seven days of mourning to honor the victims of the crash.
Train Accident in Spain Kills Dozens
1/15A passenger train passes by a wrecked train engine at the site of the train crash in Santiago de Compostela, northwestern Spain, July 26, 2013.
An investigation is under way into one of Europe's worst rail disasters following a train crash in Spain's Galicia region. At least 78 people died after the train jackknifed into a concrete wall a few kilometers before the station in Santiago de Compostela.
2/15Groom Mahmoud Mansour, 26, and his bride Maral Malka, 23, celebrate with friends and family before their wedding in Mahmoud's family house in Jaffa, south of Tel Aviv, Aug. 17, 2014.
An investigation is under way into one of Europe's worst rail disasters following a train crash in Spain's Galicia region. At least 78 people died after the train jackknifed into a concrete wall a few kilometers before the station in Santiago de Compostela.
3/15Rail workers clear the tracks next to a wrecked train engine at the site of the train crash in Santiago de Compostela, northwestern Spain, July 26, 2013.
An investigation is under way into one of Europe's worst rail disasters following a train crash in Spain's Galicia region. At least 78 people died after the train jackknifed into a concrete wall a few kilometers before the station in Santiago de Compostela.
4/15A passenger train passes by a wrecked train engine at the site of the train crash in Santiago de Compostela, northwestern Spain, July 26, 2013.
An investigation is under way into one of Europe's worst rail disasters following a train crash in Spain's Galicia region. At least 78 people died after the train jackknifed into a concrete wall a few kilometers before the station in Santiago de Compostela.
5/15A crane removes a carriage from the tracks at the site of a train crash near Santiago de Compostela, northwestern Spain, July 25, 2013.
An investigation is under way into one of Europe's worst rail disasters following a train crash in Spain's Galicia region. At least 78 people died after the train jackknifed into a concrete wall a few kilometers before the station in Santiago de Compostela.
6/15A relative of one of the victims of the train crash reacts in Santiago de Compostela, northwestern Spain, July 25, 2013.
An investigation is under way into one of Europe's worst rail disasters following a train crash in Spain's Galicia region. At least 78 people died after the train jackknifed into a concrete wall a few kilometers before the station in Santiago de Compostela.
7/15Victims receive help after a train crashed near Santiago de Compostela, northwestern Spain, July 24, 2013.
An investigation is under way into one of Europe's worst rail disasters following a train crash in Spain's Galicia region. At least 78 people died after the train jackknifed into a concrete wall a few kilometers before the station in Santiago de Compostela.
8/15Rescue workers pull victims from a train crash near Santiago de Compostela, northwestern Spain, July 24, 2013.
An investigation is under way into one of Europe's worst rail disasters following a train crash in Spain's Galicia region. At least 78 people died after the train jackknifed into a concrete wall a few kilometers before the station in Santiago de Compostela.
9/15Emergency personnel respond to a train derailment in Santiago de Compostela, Spain, July 24, 2013.
An investigation is under way into one of Europe's worst rail disasters following a train crash in Spain's Galicia region. At least 78 people died after the train jackknifed into a concrete wall a few kilometers before the station in Santiago de Compostela.
10/15Emergency personnel treat survivors after a train derailment in Santiago de Compostela, Spain, July 24, 2013.
An investigation is under way into one of Europe's worst rail disasters following a train crash in Spain's Galicia region. At least 78 people died after the train jackknifed into a concrete wall a few kilometers before the station in Santiago de Compostela.
11/15Emergency personnel respond to a train derailment in Santiago de Compostela, Spain, July 24, 2013.
An investigation is under way into one of Europe's worst rail disasters following a train crash in Spain's Galicia region. At least 78 people died after the train jackknifed into a concrete wall a few kilometers before the station in Santiago de Compostela.
12/15Місто Фергюсон.
Багато американців обурились тим, як поліція міста повелась у перші дні протестів. Проти мітингувальників виставили мілітаризовані підрозділи поліції, а до журналістів застосували силу.
An investigation is under way into one of Europe's worst rail disasters following a train crash in Spain's Galicia region. At least 78 people died after the train jackknifed into a concrete wall a few kilometers before the station in Santiago de Compostela.
13/15Rescue workers pull victims from a train crash near Santiago de Compostela, Spain, July 24, 2013.
An investigation is under way into one of Europe's worst rail disasters following a train crash in Spain's Galicia region. At least 78 people died after the train jackknifed into a concrete wall a few kilometers before the station in Santiago de Compostela.
14/15Rescue workers and officials are seen amongst the wreckage of the train crash near Santiago de Compostela, northwestern Spain, early July 25, 2013.
An investigation is under way into one of Europe's worst rail disasters following a train crash in Spain's Galicia region. At least 78 people died after the train jackknifed into a concrete wall a few kilometers before the station in Santiago de Compostela.
15/15Relatives of the victims involved in the train accident react at a victims' information point in Santiago de Compostela, Spain, July 25, 2013.
An investigation is under way into one of Europe's worst rail disasters following a train crash in Spain's Galicia region. At least 78 people died after the train jackknifed into a concrete wall a few kilometers before the station in Santiago de Compostela.
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