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.