Although there’s been no confirmation of radiation risk in food purchased at Walmart stores, the FDA said that it has detected unsafe levels of cesium-137 contamination at four U.S. ports. This contamination likely suggests that the shrimp was packaged in unsanitary conditions.

The US Food and Drug Administration on Tuesday urged the public not to eat certain bags of frozen raw shrimp sold at Walmart, citing concerns about unsanitary conditions and radioactive contamination found in shipments from the same supplier.

On August 19, the United States Food & Drug Administration (FDA) unlocked a new fear for shrimp lovers everywhere. The federal agency issued a public alert that certain raw frozen shrimp products imported from Indonesia and sold at Walmart may have been contaminated with radiation.