Nearly a dozen people were stabbed at a Walmart in Traverse City, Michigan, Saturday afternoon, in what police are calling a “random” act by a lone attacker. Six of the injured were still in critical condition hours later.

A 42-year-old man entered the Traverse City Walmart around 4:43 p.m. on Saturday and used a folding knife to stab five men and six women, according to the Grand Traverse County Sheriff's Office.

TRAVERSE CITY, Mich. − Authorities on July 27 were still trying to determine why a 42-year-old man went on a stabbing rampage at a local Walmart, wounding 11 people and prompting chaos as patrons scrambled to exit the building.