An unknown substance forced the evacuation of the South County Courthouse building in Delray Beach Monday afternoon.
Employees found a suspicious substance in the mailroom, according to the Clerk's Office.
Employees contacted fire rescue for assistance after three people were exposed.
Delray Beach Fire Rescue later determined the substance was not hazardous.
— Alyssa Hyman (@AlyssaHymanWPTV) January 9, 2017