Yum! Brands' (YUM) Taco Bell has stopped serving lettuce and cilantro at some restaurants in the Detroit metro area amid a growing cyclosporiasis outbreak in Michigan, multiple news outlets reported Tuesday.

Neither Taco Bell nor government health officials have publicly linked the chain's produce to the outbreak, which has infected 3,309 people in Michigan as of Tuesday, with at least 44 hospitalizations, the Detroit Free Press reported.

The Michigan Department of Health and Human Services said Monday that lettuce and other salad greens have emerged as a common products in the investigation, though no specific product, grower or supplier has been identified as the source, the Free Press reported.

Taco Bell did not immediately respond to a request for comment from MT Newswires.

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