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SANTIAGO DE COMPOSTELA, Spain -- Spanish investigators are trying to determine what caused a passenger train to jump the tracks just before arriving in the northwestern shrine city of Santiago de Compostela yesterday.

The accident happened on the eve of a major religious festival that attracts tens of thousands of Christians from around the world every year. Spain's Interior Ministry says the possibility that the derailment was caused by a terrorist attack has been ruled out.

The death toll rose to at least 77 overnight as rescue workers searched through smashed cars alongside the tracks, and officials say it could go higher. More than 140 people were injured.

Prime Minister Mariano Rajoy, who was born in Santiago de Compostela, is visiting the crash scene today. Officials in the city have canceled ceremonies for the religious festival today.