Leaked audio reveals possible cause of deadly train collision in Spain

Leaked audio recordings that were published in a Spanish newspaper reveal the back-and-forth conversation between the train drivers and a control center just minutes before a deadly crash on Wednesday morning. The audio only tells half the picture, a spokesperson for the train drivers' union said.

What we know about the deadly high-speed train crash in Spain

Recordings between a control centre and the train drivers appear to show one train was given clearance to move even though another train had stalled on the track.

Emergency workers continued searching the wreckage in Urda, Spain, overnight Oct 28 after a high-speed train collision killed at least 68 people and injured dozens more.