Between 07:37 and 07:40 on Thursday 11, March 2004, at the peak of the morning rush hour, ten explosions occurred aboard four commuter trains in Madrid. All trains were traveling on the same line and direction between Alcalá de Henares and the Atocha station. At 08:00, emergency relief workers began arriving at the scenes of the bombings. The police reported numerous victims and spoke of 50 wounded and several dead. Bystanders and local residents helped relief workers, as hospitals were told to expect the arrival of many casualties. At 08:43, fire fighters reported 15 dead at El Pozo. By 09:00, the police had confirmed the death of at least 30 people, 20 at El Pozo and about 10 in Santa Eugenia and Atocha. The total number of victims would later rise to 191.

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