After nearly a dozen people were stabbed at a Walmart in Traverse City, Michigan, Saturday afternoon, the quick actions of a couple of Marines and other bystanders helped stop the attacker from causing further harm.

Grand Traverse County Sheriff Michael Shea said a motive behind the attack by Bradford Gille of Afton, Michigan, remains unclear.

Stabbing suspect Bradford James Gille was subdued within minutes with the help of bystanders, authorities said.