The Food and Drug Administration is using its most severe notice in a recall of more than 6,000 bags of chips in two states because of “undeclared milk.”

According to the FDA, If consumers have an allergy or sensitivity to milk, they should not consume the product and discard it immediately.

The FDA classified recalled Lay's Classic Potato Chips in two states under a Class 1 recall, meaning consumption could be fatal for people with a milk allergy.