The Railway Accident Investigation Commission (CIAF)The Spanish Railways Authority (AER) issued its first report on Friday regarding the cause of the train accident in Adamuz (Córdoba), based on rail and tread samples. The tread is the outer surface of the train wheel in direct contact with the track. The document suggests that the leading hypothesis is that the left rail of the track broke before the Iryo train passed. "Car 6 derailed due to a complete loss of track continuity," it states. The condition of the railway tracks on this section of the high-speed line in Córdoba has been a focus of the authorities' investigation almost from the outset. At the site of the accident, where an Iryo train car overturned and collided with an Alvia train traveling in the opposite direction, causing 45 fatalities, a broken section of track was identified, as well as damage to the undercarriage of some train cars. marks were detected which could correspond to a defect in the rails, as the Spanish government had explained.