A limited number of 13-ounce bags of Tostitos yellow corn tortilla chips were recalled by Frito-Lay in late March because of undeclared milk.

The Food and Drug Administration this week upgraded the recall of Frito-Lay's Tostitos Cantina-style corn chips to the agency's most severe classification.

The recall has now been upgraded to Class I, meaning “there is a reasonable probability” that eating the chips could “cause serious adverse health consequences or death”