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.

At least twelve deaths have been reported in the United States amid a multi-state outbreak of Listeria infections linked to supplemental shakes, the US Centres for Disease Control and Prevention

Nutritional milkshakes served in long-term care facilities were recalled Saturday after being linked to 12 deaths and dozens of hospitalizations, according to the CDC.

The outbreak has infected 38 individuals, 37 of whom have been hospitalized, and 12 who have died A listeria outbreak linked to recalled frozen shakes has left 12 people dead, according to the U.S. Food and Drug Administration (FDA).