More than 1.5 million bags of different shredded cheeses sold at major retailers, including in California, have been voluntarily recalled due to possible metal contamination, authorities said.

The recall was initiated in early October by Great Lakes Cheese Co., an Ohio-based company, according to the U.S. Food and Drug Administration. The voluntary recall covered more than 260,000 cases of shredded cheese, and was prompted by the possibility of metal fragments in the products, an FDA notice said.

The FDA upgraded the recall Monday to “Class II,” meaning the use of or exposure to the identified products can cause temporary or “medically reversible adverse health consequences.”

The FDA’s investigation into the recall is ongoing. Great Lakes Cheese Co. did not immediately respond to The Ti

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