More than 50 people have been evacuated after a gas smell was detected in the Tuggeranong Officeworks.
Firefighters were called to Scollay Street, Greenway about 12.40pm on Sunday due to the smell of gas coming from a lift shaft at the business.
People were also evacuated from the neighbouring BCF and Petbarn.
As of 1.50pm, ACT Fire and Rescue crews were conducting atmospheric monitoring to determine the cause of the smell.
Firefighters conducted their final sweep of the building about 3pm, with people expected to return inside shortly afterwards.