LEXINGTON, Ky. (WKYT) - It was a cold morning for workers at police headquarters in downtown Lexington.
About 5:30 Tuesday morning, workers had to evacuate the building after something set off the fire alarms.
Officials say that once the alarms went off their system released a chemical called halon, which displaces the oxygen in the room to put out fires.
Because of that, everyone had to be evacuated.
They used fans to air out the building.