A Hamilton Tim Hortons is undergoing decontamination after what appears to have been a bear spray incident.
It happened shortly after noon today, at a Barton Street East Tim Hortons.
Hamilton police say two younger males, aged between 15 and 25, walked inside the location and sprayed an unknown substance in the air.
7 people were affected and taken to hospital for medical attention.
Police say the victim's symptoms were consistent to a reaction from bear spray.
The suspects were last seen running southbound from the area.
Police are reviewing video footage.
The investigation is ongoing.