Brookville Police Major Tom Simon said someone called in a threat around 9 a.m. and a Brookville school bus was utilized to evacuate the building.
A bomb-sniffing dog from the Dayton International Airport was called to the scene. The building was searched and nothing was found, Simon said.
Those evacuated were transported off the property to a nearby VFW building, Post 3288, then to another location before being allowed to return to work.
The incident remains under investigation.