An article published in Saturday's edition of the Mexican newspaper La Jornada provides more details about the cause of the crash. The article is in Spanish; here are some of the main points, translated into English:

1. According to the CIAF, the break in the track was "practically undetectable." The fracture on the track was not noticed by the trains that passed over it, or by the technicians responsible for the maintenance of the infrastructure.

2. The damaged train, which belongs to the Italian company Iryo, is heavier than other trains running on the track; the additional weight of the Iryo train may have been a factor, or possibly even one of the causes, of the derailment.

3. The CIAF said that the notches registered in the wheels and the deformation in the rail are "compatible" with the fact that the track was broken before the Iryo train passed over it.

4. Spanish Transportation Minister Óscar Puente rejected criticism of the delay of the rescuers; according to the Minister, rescuers arrived within "18 minutes."

The full article is available here: https://www.jornada.com.mx/2026/01/24/mundo/020n3mun