The Danbury Superior Courthouse was evacuated after a powdery substance that turned out to be Tylenol, was found inside the lobby, according to police.

Police say officials and the fire department responded to the court house at 146 White Street around 10 a.m.

A white-colored powdery substance was tested inside the lobby and later determined to be acetaminophen, also known as Tylenol, according to officials. 

At least 200 people were evacuated from the court house and a bus was used for evacuees to stay on while officials investigated. 

The Tylenol was removed from the lobby and the building was reopened. Police say the incident was deemed to be accidental in nature with no threat to the public.