Walmart Inc (NYSE:WMT, ETR:WMT) has recalled several batches of frozen shrimp in 13 US states after regulators found traces of radioactive Caesium-137 in a shipment from Indonesia.
The Food and Drug Administration said one sample of breaded shrimp tested positive for the isotope, though the affected product did not reach store shelves.
Consumers in states including Texas, Florida and Pennsylvania have been urged to discard products from three specific batches.
The FDA said the level detected would not cause immediate harm, but prolonged exposure could raise cancer risk.
Walmart has removed the products from sale, imposed restrictions and is offering full refunds.
The Indonesian supplier has had multiple containers denied entry as investigations into the source of contamination continue.