Authorities in Matteson, Illinois, ordered an evacuation after a freight train derailed in the Chicago suburb on Thursday morning.

The derailment occurred around 10:30 a.m., and there have been no reported injuries.

Crews are working to assess whether any hazardous materials have spilled from the train. As a precaution, officials have instructed residents within a one-mile radius of the incident to evacuate.

A post on the village’s Facebook page advises residents to prepare for a “long-term” evacuation and to bring essential medications and supplies with them when they leave.

Messages left for village officials and Matteson Police Chief Michael Jones by The Associated Press seeking further information have not yet been returned.