NAFCO Wholesale Seafood Distributors in Jessup, Maryland, says Monday’s mass food poisoning incident, which left 46 people seeking medical attention, was caused by homemade food prepared by an employee.

“The [Howard County Health Department] investigation has preliminarily determined that an employee prepared food at his home over the weekend, ultimately serving the homemade food to fellow employees who became sick yesterday,” the company said in a statement released Tuesday.

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