People have been warned not to eat certain shrimp sold at Walmart stores across 13 US states due to possible radioactivity.

The Food and Drug Administration (FDA) said today that the seafood was found to contain Cesium-137.

Customs found traces of the substance in Great Value brand shrimp delivered to ports in Savannah, Miami, Houston and Los Angeles.

Testing on the breaded shrimp from Walmart’s distributor, Indonesia’s BMS Foods, came back positive, the FDA said.

Food safety officials stressed that no contaminated shrimp has entered the food supply.

People have been warned not to eat, sell or serve certain Great Value raw frozen shrimp.

The products include the following product names, lot codes, and best by dates: • Great Value brand Frozen Raw Ez Peel Tail-On Farm-Raised White V

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