At least 11 people were injured in a stabbing at a Walmart store in the Midwestern state of Michigan on Saturday, with police saying it appeared to be a random attack.

A 42-year-old male suspect was in custody, Grand Traverse County Sheriff Michael Shea told a news conference.

"Based on the information that we have at this time, it appears they were random acts," Shea said of the attack in Traverse City, Michigan.