RCMP Staff Sgt. Major John Buis said the victim, who was taken to hospital with serious but not life-threatening injuries, is not co-operating with the investigation and may have mental health issues.
Officers are now reviewing surveillance tape from the mall and interviewing witnesses, he said.
"I know there were quite a few people in that food court area. We are interviewing those people and we are very thankful people did come to the assistance of this person," said Buis.