The Food and Drug Administration has recalled three more lots of frozen shrimp over concerns the products may be contaminated with a radionuclide (Cesium-137). The recall applies to a limited quantity of Great Value frozen raw shrimp EZ-peel & deveined tail-on 21-25 per pound packages.

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

Update, August 22, 7:04 am EDT: On August 21, the FDA expanded its recall to include raw and cooked frozen shrimp products sold by Southwind Foods, LLC. The FDA and Southwinds Food said that the company is “voluntarily recalling a limited quantity of frozen shrimp” due to possible contamination with Cesium-137.