The driver of the train which derailed in northern Spain killing at least 78 people has been formally arrested by police.
Francisco Jose Garzon remains in hospital after Wednesday's crash and is under police guard.
But it's understood he is not answering questions. And it is still not clear why the train was going so fast.
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Police said the child, who was without a driving licence, was trying to make his way 2,500 miles from the east coast to Perth.