The U.S. Food and Drug Administration and the Centers for Disease Control and Prevention said on Monday the agencies were investigating a multi-state outbreak of listeria infections linked to frozen supplemental shakes manufactured by Prairie Farms Dairy Inc.

A nationwide recall of frozen nutritional shakes has been issued after a listeria outbreak tied to the drinks resulted in multiple hospitalizations and deaths across the United States, according to the U.

Investigators suspect nutritional shakes manufactured by a Prairie Farms Dairy, Inc. facility in Fort Wayne are responsible for a listeria outbreak that has killed 12.