Police have declared an emergency situation under the Public Safety Preservation Act in Brisbane City.
Around 2pm, a suspected suspicious device was located near Queensland Police Service Headquarters.
The declaration is in place for Makerston, Roma, Garrick and May streets, as well as North Quay and all the area within.
Specialist police are in attendance.
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.