By the time an employee in the checkout area yelled about a man with a knife, it was too late. Nearly a dozen people had been stabbed at the busy Walmart in Traverse City, a tourist town on the shore of Lake Michigan, by a man who appeared to have attacked people at random, the sheriff said.

Officials said the stabbings happened near the checkout area of the store and appeared to be random in nature.

Video footage from the incident shows bystanders confront the suspect after a stabbing rampage that initially left 11 people injured.