SANTIAGO DE COMPOSTELA, Spain - Police say they have detained the driver of a train that crashed in northwestern Spain and killed 78 people.
Galicia region National Police Chief Jaime Iglesias said driver Francisco Jose Garzon Amo was officially detained in the hospital where is recovering.
Iglesias said Friday that Garzon Amo would be questioned "as a suspect for a crime linked to the cause of the accident."
He said the driver is being guarded by police and cannot yet testify because of his medical condition. Iglesias said he did not have details of the medical condition but that it could delay the driver's statement.
There are reports that the train was traveling at 120 mph, more than double the 50 mph speed limit, when it hurtled along a curve and derailed into the wall, bursting into flames.
The Daily Mail reported that the "black box" recorded its driver, Garzon Amo, begging controllers for advice on what to do in the moments after it went off the tracks, yelling: 'I've derailed. What do I do? I f***** up. I want to die.'
It is Spain's worst train crash in decades. Besides killing 78 people, it injured 141 people.
Investigators have taken possession of the "black boxes" of the train and are in the process of analyzing it, court spokeswoman Maria Pardo Rios said Friday. The boxes record train's trip data, including speed and distances and braking and are similar to flight recorders for airplanes.
A makeshift morgue has been set up in a sports arena in Santiago de Compostela, in the northwestern Galicia region, where the train crashed Wednesday just as it was entering the outskirts of the city, said Antonio de Amo, the police chief in charge of the scientific service for Spain's National Police.
De Amo said police are still working to identify what they believe are the remains of six people.
Analysis will be performed to determine why the train was traveling far above the speed limit when it crashed near a station in Santiago de Compostela, Rios said. She declined comment on how long the analysis will take.
Garzon last year had posted a picture on Facebook of a train speedometer at 125 mph and had boasted about how fast he was going, the Daily Mail reported. Along with the picture was the caption, "What joy it would be to get level with the police and then go past them making their speed guns go off. Ha ha!" the newspaper reported.
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Video of the train crash can be seen below. Mobile users can watch it here: http://www.youtube.com/watch?v=o32nxuHshv4