Hanover, PA  — Emergency crews responded to a possible carbon monoxide leak Wednesday morning in Hanover, York County.

The incident happened at Select Physical Therapy on the 700 block of Tree Court around 11 a.m.

Five to six people reported headaches, but there were no serious symptoms, according to officials.

Several ambulances were sent to the business as a precaution.

Firefighters checked the building, and everyone has been evacuated.

Columbia gas crews were also at the scene.