At least 11 people have been injured in a stabbing at a Walmart supermarket in Michigan, authorities say, BBC reported.

One suspect was in custody following the incident in Traverse City, authorities confirmed.

A nearby hospital said it was treating 11 victims. "As a result, our Emergency Department is currently experiencing a higher-than-usual volume of patients," Munson Medical Centre said on social media. Local media reports said three people were undergoing surgery.

Footage posted online shows multiple police and ambulance units in the carpark of the Walmart, according to BBC.