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.

"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, which wounded 11 people.

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