Nearly a dozen people were injured in the attack before citizens -- including Derrick Perry, who was armed with a gun -- confronted the suspect, authorities said.

Matthew Kolakowski was shopping with his daughter at a Michigan Walmart when he heard screams and saw a man with a knife.

GRAND TRAVERSE COUNTY, MI -- The victims in Saturday’s stabbing attack at a Walmart in the Traverse City area are all progressing. According to an update issued Tuesday morning by Munson Healthcare, all 11 victims are in fair condition or better.