The FDA is warning the public not to eat, sell or serve certain Great Value raw frozen shrimp sold at Walmart due to possible contamination with Cesium-137.

The U.S. Food and Drug Administration is warning people to avoid eating certain raw frozen shrimp sold in Walmart stores as the agency investigates possible contamination by Cesium-137, a radioactive isotope.

Walmart has recalled some shrimp products in 13 US states after one shipment of seafood tested positive for radioactive contamination. The US Food and Drug Administration said varieties of frozen shrimp sold under Walmart's Great Value label could have been exposed to a dangerous isotope in shipping containers.