Police have declared an emergency situation under the Public Safety Preservation Act (PSPA) at Windsor.
The emergency situation was declared at 5.37pm after police located a suspicious device at a dwelling on Bryden Street.
Police including specialist officers are on-scene.
The area declared is bounded on the west by Lutwyche Road, east by Flynn Oval, north at Cartwright Street and south of Gallway Street.
Motorists are advised to avoid the area. Residents are encouraged to remain indoors until the situation is resolved.
There is no further information available at this time.