Contaminated metal at an Indonesian industrial facility appears to be the culprit behind radioactive shrimp that triggered massive recalls across U.S. grocery stores, international nuclear officials revealed Friday.

The International Atomic Energy Agency confirmed they’re working closely with Indonesian regulators who detected Cesium-137—a radioactive isotope—at a processing plant that shipped millions of pounds of frozen shrimp to American ports.

What We Know So Far

The contamination likely originated from a metal melting facility at the same industrial site in Serang, west of Jakarta, or from scrap metal disposal in the area, according to the IAEA. The exporter, PT Bahari Makmur Sejati (BMS Foods), has already recalled more than 300 shipping containers headed to the U.S.

Here’s the s

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