Walmart has recalled frozen, raw shrimp sold in 13 states after federal health officials warned of potential radioactive contamination. The U.S.

Still, the FDA recommends that Walmart recall certain lots of Great Value raw frozen shrimp as a precautionary measure. The recalled shrimp were sold at Walmart stores in the following states—Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Missouri, Mississippi, Ohio, Oklahoma, Pennsylvania, Texas, and West Virginia.

The U.S. Customs & Border Protection (CBP) first detected the material in shipping containers at four ports located in the U.S., including Los Angeles, Houston, Miami and Savannah, Georgia. The discovery prompted the FDA's advisory and investigation.