Expired sales labels led to overcharges on more than 150 grocery items, according to an investigation led by Consumer Reports and others.

Shoppers at one of the nation’s largest grocery chains may be unknowingly paying more for groceries. An in-depth investigation by Consumer Reports and two news organizations found that customers were often charged higher prices at checkout than what was listed on store shelves.

Kroger told Consumer Reports, "while any error is unacceptable, the characterization of widespread pricing concerns is patently false.'