The Food and Drug Administration has expanded its recall of a limited number of bags of frozen shrimp, warning the public not to eat, sell or serve certain frozen shrimp from an Indonesian supplier.

Earlier this week, Walmart said it removed Great Value-brand imported frozen shrimp from store shelves in 13 states after the FDA found contamination from a radioactive isotope in shipping containers and in one sample. On Thursday, the FDA said that Southwind Foods, based in California, had also recalled some of its frozen shrimp because of possible contamination.

Barbara Kowalcyk, director of the Institute for Food Safety and Nutrition Security at George Washington University, said the risk to the public was very low.

“I think they’re doing the recall as a precautionary approach,” she said

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