A chemical incident at Hasa, Inc. reportedly sent two people to the hospital.

According to the Santa Clarita Valley Signal, a chemical spill occurred on the afternoon of October 16 at the chlorine manufacturer’s Saugus, California, location.

Kaitlyn Aldana, a Fire Department spokesperson, said an unknown substance spill at the chemical company prompted the Fire Department’s Health Hazardous Materials Division to evacuate the building.

The cause of the spill and the extent of the people’s injuries was not reported.

This is the second chemical incident at Hasa in recent months. In July, seven people were hospitalized and nine additional people were treated at the scene for injuries after a chemical spill. During that incident, a transport line leaked approximately 40 gallons of muriatic acid in the facility’s secondary containment unit, where firefighters speculated some other chemical was already on the ground, causing off-gassing.