Walmart pulled certain shrimp from its shelves in 13 states after the FDA raised concerns about potential radioactive contamination.

The FDA is warning that customers should avoid eating certain frozen shrimp sold at Walmart over concerns that it was possibly exposed to radioactive material.

The amount of Cesium-137 detected within the contaminated shipment would not pose an acute hazard to consumers. However, long-term consumption would pose an elevated risk of cancer.