Occupational Health and Safety (OHS) is investigating the death of a Calgary supermarket employee who felt unwell while on the job and later died. OHS said a worker at the T&T Supermarket located in Sage Hill was taken to hospital and died on May 12. “It is always tragic when a worker dies on the job,” OHS said in a statement. CTV News has reached out to T&T Supermarket for comment. No further details were provided by OHS as the investigation is ongoing.