The U.S. Food and Drug Administration upgraded a recall of Lay's potato chips to its highest level over fears that consuming the products could cause serious illness or death to some at-risk groups ...

The FDA classified the recall of Lay's Classic Potato Chips in Oregon and Washington state as a Class 1 recall, which means consumption could be fatal for people with a milk allergy.

PepsiCo, which set up its first potato chip plant in India in 1989, supplies the FC5 seed variety to a group of farmers who in turn sell their produce to the company at a fixed price.