A scare at a Clare County post office has left seven people in isolation.

While loading mail at the Lake Station Post Office in Garfield Township Monday morning, workers noticed a possible Mercury spill. The workers were isolated, and a nearby store was also evacuated.

They are said to be monitored onsite rather than risking exposure to others at the hospital.

No adverse health affects were reported by any of those exposed.

Officials are investigating the package, but it appears to have been shipped from the Detroit region.