A train collided with a double-deck bus early Monday northwest of Mexico City, killing at least eight people and injuring 45, authorities said.

The State of Mexico’s civil defense agency said via X that emergency crews were still working at the scene of the accident in an industrial area. Officials gave no immediate details about how the collision occurred and said the situation remained under control as first responders continued rescue and recovery operations.

The toll of eight dead and 45 injured was reported by the civil defense agency and is considered preliminary as authorities continued to assess the scene and account for those involved. Local emergency services were coordinating with municipal and state officials to secure the area and provide medical attention to the injured.

The crash took place in the State of Mexico, the region that surrounds parts of the capital, on Monday morning. Authorities did not release the identities of the victims or specify which hospitals were treating the injured. Investigators from regional transport and public safety agencies were expected to examine the site and gather evidence to determine the cause of the collision.

Train collisions with road vehicles, including buses, have in the past prompted inquiries into signaling, crossing protections and adherence to traffic rules, but authorities in this case have not indicated whether any of those factors are under investigation. The civil defense agency said it would provide updates as more information becomes available.

State and municipal officials have not yet issued public statements beyond the civil defense post, and no arrests or charges were reported early Monday. The incident disrupted activity in the surrounding industrial area as responders worked to clear the scene and restore normal operations.

Media and emergency dispatch logs from the region listed the crash among several transportation-related incidents reported that day, but the civil defense agency characterized Monday’s collision as a discrete event requiring an active on-site response. Authorities urged the public to avoid the area to allow emergency personnel to work and to follow official channels for updates.

Further details, including a timeline of the collision, the condition of those injured and any forthcoming safety measures, were pending as investigators continued on-scene work and collected information.