The FDA has expanded its recall of frozen shrimp over potential radioactive contamination, now affecting more U.S. states.

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.

Walmart is recalling three of its Great Value brand frozen shrimp products after U.S. agencies uncovered the presence of radioactive material in one sample of breaded shrimp.