The Costco store in southeast Calgary was closed temporarily on Saturday, because of a refrigerant gas leak in a warehouse.

The fire department was called to the store on Heritage Gate southeast around 5 a.m. MT.

A large volume of gas had spilled from a failed refrigeration unit, officials said.

Hazardous materials crews ventilated the area and deemed it safe for staff to return to the building by 9:30 a.m.

There was no danger to the public in the surrounding area and no injuries were reported, officials said.

Refrigerant gas is colourless and heavier than air with a faint sweetish odour. It is considered a respiratory irritant.