Oaxaca, Mexico—A collision involving a passenger bus on a mountain highway resulted in at least three fatalities early Friday. The incident occurred on a notoriously steep and winding stretch of road in the southern state of Oaxaca.

Authorities confirm the bus sustained significant damage after impacting another vehicle. Emergency responders were dispatched to the scene, though the remote nature of the highway slowed initial access.

Medical personnel are currently treating several passengers who sustained injuries during the impact. Those in critical condition were transported by ambulance to the nearest regional hospitals.

Preliminary reports suggest the narrow lanes and slick road conditions played a role in the crash. State police have closed a segment of the highway to conduct an investigation into the cause.

The bus was reportedly mid-transit, carrying passengers between rural mountain communities and the city center. Identification of the deceased is underway as investigators process the scene.

Local officials expressed concern regarding the safety standards of transit routes in this mountainous region. This specific highway frequently records accidents due to its sharp turns and lack of protective barriers.

Crews are using heavy equipment to clear the wreckage from the narrow path. The blockage has caused a backup of transit vehicles in both directions as authorities work to restore flow.

The transport company has yet to release a statement regarding the mechanical status of the bus. Official inquiries into the driver’s actions and the condition of the vehicles are expected to begin once the scene is cleared.