But the unpleasant smell didn't turn out to be gas at all — and was actually durian, a smelly fruit.
"We are open!" the university wrote online about an hour later. "The lingering gas-like smell in the building is completely safe — someone left a durian fruit in one of our bins!"
The "offending fruit," as dubbed by the school, has a creamy, stringy texture, but also a smell that Smithsonian magazine once compared to “turpentine and onions, garnished with a gym sock.”
The fruit caused the second mass evacuation of an Australian university. In April 2018, fire officials in Melbourne warned of a chemical hazard at the Royal Melbourne Institute of Technology and said the smell of gas had been reported.
After hundreds were evacuated, it turned out the possible leak was "not chemical gas, but gas generated from rotting durian, an extremely pungent fruit which had been left rotting in a cupboard."
Fox News' Michael Bartiromo contributed to this report.