Days after the FDA issued a do-not-eat warning about imported shrimp sold at Walmart, a Florida company actually issued a recall of that shrimp and a California company recalled shrimp sold under five other brands.

The FDA is warning consumers not to eat certain frozen shrimp products sold at Walmart after other products from the same company tested positive for a radioactive substance.

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