The Food and Drug Administration is warning about possible contamination of some Great Value raw, frozen shrimp.

The Great Value brand is a brand owned by Walmart, one of the big box store chain's private label brands, exclusively sold at Walmart stores.

The U.S. Customs and Border Protection detected possible Cesium-137 in shipping containers at four U.S. ports. Testing on the shrimp came back positive.

Cesium is a soft, flexible, silvery-white metal that becomes liquid near room temperature. Exposure can cause burns, acute radiation sickness and even death.

The shrimp was distributed by Indonesia's BMS Foods. The FDA believes the food was prepared, packed or held in insanitary conditions.

Walmart stated the recall affects the following 13 states: Alabama, Arkansas, Florida, Georgi

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