Members of the Saskatoon Fire Department and Hazmat responded to a report of ill persons at a local business in the North Industrial area on Wednesday.
At around 1:55 p.m. CT, a call reported a number of employees at 829 48th St. East were experiencing symptoms of carbon monoxide (CO) exposure.
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Fire department officials said they recorded carbon monoxide levels to be 65 parts per million inside the business.
There were 50 employees inside and the building was evacuated.
A propane-fueled forklift was determined to be the source of carbon monoxide.