Walmart announced a recall on Tuesday for Great Value raw frozen shrimp products after the U.S. Food and Drug Administration detected a radioactive chemical that may pose a safety concern. The FDA detected Cesium-137, a radioactive isotope of Cesium, on a single shipment of frozen shrimp imported from Indonesian company PT. Bahari Makmur Sejati.

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.

Some packages of Great Value frozen shrimp sold at Walmart are at risk for potential for Cesium-137 contamination, the FDA says.