Police are investigating a mass stabbing where a 42-year-old man entered the Walmart in Traverse City and used a folding knife to stab 11 people.

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.

Eleven people were stabbed at a Walmart in Traverse City on Saturday — with six in critical condition — in what a Michigan sheriff said appeared to be a random act. A suspect was in custody, authorities said.