U.S. Customs and Border Protection detected Cs-137 in shipping containers at four ports in the United States. The FDA tested a sample of frozen shrimp from Indonesia’s BMS Foods, which came back positive for Cs-137. No shrimp that has tested positive for Cs-137 has entered the U.S. food supply, per the FDA.

Some packages of Great Value frozen shrimp sold at Walmart are at risk for potential for Cesium-137 contamination, the FDA says.

Walmart has recalled frozen, raw shrimp sold in 13 states after federal health officials warned of potential radioactive contamination. The U.S.