Three employees of the Langley Staples store on Willowbrook Drive East were treated for exposure to pepper spray following an incident at the office supply store on Thursday afternoon (June 30).
No serious injuries were reported, but the store remained behind police tape for much of the afternoon and staff waited outside for the fumes to clear.
Police, fire and ambulance crews were called around 2:30 p.m.
One woman was arrested following a confrontation with store staff.
A man who identified himself as the woman's boyfriend told The Times that there was a struggle after store staff accused her of trying to shoplift merchandise and she tried to leave.
He said the girlfriend used her pepper spray after staff tried to wrestle her to the ground.
"She was shopping for art supplies," the man said.