Officials are shocked and confused as they struggle for answers

The worst high-speed rail accident in more than a decade in southern Spain on Sunday was a devastating tragedy for the country, killing at least 42 people.

Amid the grief, many are asking what could have caused such a breakdown in one of Europe’s most revered rail systems.

The CIAF Railway Investigation Committee has begun an analysis of why a train traveling north from Malaga derailed on a straight section of the route, causing it to collide with an oncoming train, which also derailed.

The Spanish government described the accident as “extremely bizarre”.

Three bodies had been recovered from the wreckage on Tuesday afternoon, and a 42nd victim was found at the crash site near Adamuz.

Why a railway line that has been running efficiently for a long time suddenly paralyzed this sleepy town even more shocked.

After Spain’s high-speed rail (AVE) network opened in 1992, it was regarded as a symbol of the country’s modernization. Built with EU funding, it provides a state-of-the-art transport system that is fast, efficient and safe.

The 2013 derailment near Santiago de Compostela that killed 80 people was not part of the AVE network, although the train was traveling at high speed at the time. However, Sunday’s collision occurred on the oldest AVE route linking Madrid and Andalusia.

Several officials, including Álvaro Fernández Heredia, president of national rail operator Renfe, said human error was almost certainly not the cause of the accident because neither train was speeding. Interior Minister Fernando Grande Marasca insisted that vandalism was not the probable cause.

Inevitably, investigators are keeping a close eye on the derailed train.

The train is owned by the Italian company Iryo and built in 2022. Transport Secretary Óscar Puente said the train’s No. 6 car would be scrutinized because it was the first to derail and provided “many pieces of the puzzle.”

However, investigators are still examining the section of track where the derailment occurred and plan to analyze some of its contents in the laboratory.

News that part of the track was damaged at the crash site sparked speculation that this could be the culprit.

The government has been keen to play down such conclusions, pointing out that the track may have been damaged by the force of the collision.

Some observers have drawn attention to possible underlying factors on the network.

Rail infrastructure administrator Adif reportedly took to social media last year to draw attention to eight technical issues on the line near the site of the accident. Most of those issues have to do with signaling, one of which was discussed in the Senate last summer.

Adif reduced the speed limit on the AVE on a 150-kilometer (93-mile) stretch between Madrid and Barcelona due to concerns about the condition of the line. The new speed limit on this stretch of road is 160 km/h, almost half the previous speed limit.

Since the collision, many social media users have tagged past posts in which they complained about the discomfort of moving on AVE trains.

One user captured video of violent vibrations inside a train in December and commented that it made them “worry for my safety and that of my daughter.”

In August 2025, train drivers’ union Semaf issued a communiqué warning that conditions on some AVE lines were causing a “lack of comfort and reliability” for passengers.

It called for speed limits to be lowered to prevent further deterioration of infrastructure and “keep workers and travelers safe”.

The dissatisfaction could be a sign that Spain’s high-speed rail network is in dire need of an overhaul. However, the government counters that the section of road where the accident occurred last year was renovated at a cost of €49m (£42m) as part of a €700m investment in recent years to update the Madrid-Andalusia network.

“When we find answers, we will inform Spaniards with absolute transparency,” Spanish Prime Minister Pedro Sánchez said of the findings as he announced three days of mourning during a visit to Adamus.

The answer could have huge implications for the future of Spain’s famed rail system.