Automatic fire alarm - Tuggeranong.

ACT Fire & Rescue has responded to an automatic fire alarm at the Tuggeranong Hyperdome shopping centre.

Crews were alerted to the incident at approximately 1pm and arrived to find the alarm had been set-off in a stairwell, by the exhaust of a blower-vac being used by a cleaner.

A small number of shoppers self-evacuated. No fire, damage or injuries are reported.