The Food and Drug Administration issues a second recall on frozen shrimp after potential exposure to radioactive material.

Southwind Foods, a California-based company, "voluntarily" recalled a select amount of frozen shrimp due to possible contamination with the radioactive isotope cesium-137, the FDA said in a Thursday press release.

The Food and Drug Administration issued an alert earlier this week about shrimp sold at Walmart over concerns that it could be radioactive. And now more shrimp are being added to the list.