12:15am Friday 16 September 2011 - Update - Factory fire in Mitchell

A 300 metre exclusion zone has now been put in place.

Three fire pumpers, bronto, hazmat, BA unit and command crews are all on scene.

The ACT Fire Brigade is working with the business operator to identify the contents of the building.

The fire has now burned through the roof of the premises as firefighters work to extinguish it.

The ACT Ambulance Service also in attendance as a precaution.