In a life threatening emergency dial Triple Zero (000)
Storm and Flood Assistance
An estimated 50 people have been evacuated from the ground and first floors of the office building.
Firefighters have identified a small gas leak in a plant room which is believed to have spread into a number of air-conditioning vents on the first two floors of the building.
There are no reports of injuries at this stage.
ACT Fire & Rescue is on scene with two fire pumpers, a Commander and the HAZMAT Unit.
