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Storm and Flood Assistance
ACT Fire & Rescue are inspecting a science room filled with mist at the Australian National University.
Crews say the mist is a combination of helium and nitrogen.
It's believed the gases may have been leftover from experiments.
An alarm system was triggered at 00:42am.
Three pumpers, the Hazardous Materials Unit, Breathing Apparatus Van and two commanders are on scene at North Road.
Update to follow.
