India, July 2 -- The U.S. Food and Drug Administration (FDA) has elevated the recall of certain Utz potato chips to a Class I recall, its most serious classification, over concerns of potential Salmonella contamination.

The designation indicates there is a reasonable probability that consuming the affected products could cause serious adverse health consequences or death.

The recall, which was initially announced voluntarily by Utz in May, affects more than 650,000 bags of Dirty and Zapp's branded potato chips. The action stems from concerns that dry milk powder used in the chips' seasoning, supplied by a third-party and sourced from California Dairies, may have been contaminated with Salmonella.

Utz said the milk powder tested negative ...