Possible contamination of shrimp by a radioisotope led the Food and Drug Administration to issue a do-not-eat-or-sell warning Tuesday for three lots of frozen shrimp sold under Walmart’s Great Value ...

The FDA detected Cesium-137, a radioactive isotope, in one shipment of Great Value frozen raw shrimp to Walmart.

The presence of the chemical element violates the Federal Food, Drug, and Cosmetic Act, said the FDA, as it appears the affected product may have been "prepared, packed, or held under insanitary cond...