The FDA has expanded its recall of frozen shrimp over potential radioactive contamination, now affecting more U.S. states.

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.

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.