At least four people were killed and three others seriously injured after they were hit by a train near Barcelona.
The victims are believed to have been among a group of revelers crossing the tracks after leaving a techno music festival.
The tragedy occurred shortly before 8.30 p.m. between Parets del Valles and Granollers stations on a section of the R3 railway line.
Authorities in Spain confirmed this evening that the death toll had risen from three to four.
Civil protection officials who relayed the information said: “The initial information was that the train had hit seven people who were crossing the tracks.
“The other three people were taken to the Mollet Hospital in Barcelona.
“There were around 150 people on the train, none of whom required medical attention.”
Train traffic on part of the route was stopped.
A spokesman for the Mossos d’Esquadra regional police said: “We are launching an investigation to find out the circumstances of this accident.”
The four people killed were described in local media as three men and one woman, all aged in their 20s.
They were reportedly leaving a techno festival when they attempted to cross the train tracks in an unauthorized place.
Thousands attended the Duro Techno Festival at the Montmeló circuit, known as the venue for the Spanish Formula 1 Grand Prix.
The event was sold out.
Catalan President Pere Aragones tweeted: “Absolutely appalled by the multiple train accident in Montmelo, a deadly tragedy that leaves us speechless.”
“Emergency services continue to operate and offer support to victims and families.
“The police are already investigating the causes of the accident.”