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

"I'm still sitting and grappling with the weight of realizing that it was kind of a life or death moment," said Julia Martell, who witnessed the stabbing that wounded 11 people.

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.