Multiple brands of raw and cooked frozen shrimp have been added to an ongoing recall of frozen shrimp due to possible radioactive contamination, according to the Food and Drug Administration.
The frozen shrimp products are sold by Southwind Foods, LLC, of Carson, California, according to an FDA alert issued on Thursday.
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In a company announcement released by the FDA, Southwind Foods said it is "voluntarily recalling a limited quantity of frozen shrimp" due to the possible contamination with Cesium-137, a radioactive isotope.
The bagged, frozen raw and cooked shrimp from the latest recall were sold between July 17 and Aug. 8 in nine states -- Alabama, Arizona, California, Massachusetts, Minnesota, Pennsylvania, Utah, Virginia and West Virginia -- the FDA said. The products were sold under the brand names Sand Bar, Arctic Shores, Best Yet, Great American and First Street, according to the recall notice.
No illnesses have been reported to date, the company said.
The products are being recalled after raw frozen shrimp sold by Great Value at Walmart was similarly recalled earlier this week due to possible contamination with Cesium-137.
Both the recalled Great Value and Southwind Foods products were packaged in Indonesia by BMS Foods, according to the FDA.
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The FDA said it determined that the shrimp from BMS Foods violates the Federal Food, Drug, & Cosmetic Act in that "it appears to have been prepared, packed, or held under insanitary conditions whereby it may have become contaminated with Cs-137 and may pose a safety concern."
Products from BMS Foods will no longer be imported into the U.S. "until the firm has resolved the conditions that gave rise to the appearance of the violation," the FDA said.
At this time, no product that has tested positive or alerted for Cesium-137 has entered the U.S. food supply, the FDA said.
The FDA said it will "continue working with industry to trace all implicated products processed" by BMS Foods, "to gather as much information about them as possible and take action as appropriate."
Cesium is a soft, flexible, silvery-white metal that becomes liquid near room temperature, but easily bonds with chlorides to create a crystalline powder, according to the U.S. Environmental Protection Agency.
External exposure to large amounts of Cesium-137, according to the EPA, can cause burns, acute radiation sickness and even death.
ABC News' Sony Salzman and Bill Hutchinson contributed to this report.
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