SAINT JOHN – City officials say they’re still investigating why air quality tests at the Gorman Arena showed elevated levels of carbon monoxide.

The higher level was detected on Sunday.

A city release says an arena attendant received a call from a user who was questioning the air quality after he and several teammates, who had used the facility Saturday night, experienced flu-like symptoms.

The attendant conducted an air quality test and noted higher-than-normal levels of carbon monoxide.

He then evacuated the building.

The city says the facility’s natural-gas boilers were checked for leaks and the ice-resurfacer had its emissions tested, but all the results were within normal guidelines.