The shrimp could be contaminated with a radioactive isotope called Cesium-137, although the FDA said that no products as of yet have tested positive for it.

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 agency told Walmart to pull three lots of raw frozen shrimp sourced from Indonesia after officials detected radioactive Cesium-137 in a shipment that did not enter the US, the FDA said in a state...