According to news from the Spanish side on the 28th local time, preliminary technical investigation and internal railway information showed that in the Spanish train collision, the front car suddenly failed in the signal system while traveling to the section of the road where the incident occurred, causing the train to lose power or automatically trigger braking protection and stop. Afterwards, the train driver reported the parking status to the Dispatch Control Center. However, during the subsequent dispatch circulation and command issuance process, the suspected control center operator was unable to accurately synchronize the actual section of the train's stranded state, causing the rear car to be erroneously released and eventually caused a serious rear-end accident.

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