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.”

The oversight could result in “death,” at least for those with a milk allergy or sensitivity, says the FDA. FDA initiated the recall on Dec. 13 and announced three days later that it was recalling the chips due to a potential or undeclared allergen. At present, no allergic reactions have been reported.

The Food and Drug Administration just raised the recall level of Lay’s Classic Potato Chips to the highest risk classification. Frito Lay issued a recall on Dec. 16 through the FDA for over 6,000 bags of Lay's Classic Potato Chips that contained "undeclared milk.