Testing has been completed on an item with white residue on it that was handed to the Springfield police station around 3.45pm.
The substance has been determined not to be hazardous or explosive, but the exact nature of it is not known.
Officers and staff have been allowed back into the station after earlier being evacuated as a precaution.
If you have information for police, contact Policelink on 131 444 or provide information using the online form 24hrs per day.
You can report information about crime anonymously to Crime Stoppers, a registered charity and community volunteer organisation, by calling 1800 333 000 or via crimestoppersqld.com.au 24hrs per day.