ACT Fire & Rescue (ACTF&R) has cordoned off an area in Bradley Street Woden after two people collapsed.
The cordon is in a small area between the McDonalds entrance to Woden Plaza and shops across the road.
Firefighters from the ACTF&R HAZMAT crew are currently conducting atmospheric monitoring in the area as a precaution before lifting the cordon.
ACT Ambulance Service intensive care paramedics have treated man and woman on scene. They are now being transported to The Canberra Hospital in a stable condition for further assessment.
The ACT Ambulance Service has transported a further four people to The Canberra Hospital for observation.
This is purely as a precaution as they were in the area at the same time as the man and woman who collapsed.
ACT Fire & Rescue have now lifted the cordon at Woden Plaza.
An initial investigation by firefighters indicated a faulty boiler may have released carbon monoxide into the air conditioning system in the building opposite the plaza entrance.
The ACTF&R HAZMAT crew have completed ventilation of the building and atmospheric monitoring and declared the area safe.
ACT WorkCover will now investigate.
[Courtesy ESA, Photo by geetee]