Zacatecas, Mexico—A passenger bus collided with a heavy trailer on a rural highway early Friday, leaving multiple people dead. The bus was traveling through a remote stretch of road when it slammed into the vehicle. The force of the impact forced the bus off the asphalt and into a ravine.

Emergency personnel from multiple neighboring municipalities rushed to the site shortly after the crash. They found the bus on its side, partially obscured by the uneven terrain. The recovery effort is complicated by the remote location of the accident.

Medical units are treating survivors at local facilities. The death toll rose steadily throughout the day as responders pulled victims from the wreckage. Officials confirmed that several of the deceased were sitting in the front rows of the passenger cabin.

State investigators arrived at the scene by mid-morning to begin their reconstruction of the event. The driver of the trailer has been taken into custody for questioning, though police have not yet pressed formal charges. The highway remains closed to all civilian traffic.

The wreckage serves as a grim sight for local residents. Debris is scattered across a wide radius from the point of impact. Teams are documenting the tire tracks and the state of the road surface, which is known for its narrow lanes and lack of signage.

This stretch of highway has seen a rise in accidents over the past year. Regional advocacy groups have been vocal about the need for better lighting and guardrails in this section. Their warnings appear to have been ignored until today’s tragedy.

Federal agencies are coordinating with state police to expedite the identification process. Many of the passengers were traveling to distant cities for work, and notifying their families remains a logistical challenge. The site is currently being cleared of the largest pieces of debris.

Authorities expect the investigation into the mechanical state of both vehicles to take several days. The highway is slated to reopen once the forensic analysis concludes. Until then, the route is diverted through mountain passes.