| Federal agents have arrested 115 illegal workers at a Pilgrim's Pride chicken plant in Moorefield, West Virginia.
U.S. Immigration and Customs Enforcement officials say agents had taken 311 people into custody at the West Virginia and other US plants by Thursday afternoon.
Ninety-one face criminal charges alleging false use of a Social Security number and document fraud.
The rest face charges of immigration violations and were being processed for deportation.
Pilgrim's Pride, the nation's largest chicken producer, is not facing charges because they cooperated with officials.
The sting operation stemmed from a long-term investigation that began early last year that included a Pilgrim's Pride worker accused of dealing identification documents and a human resources employee at the company's Mount Pleasant facility.
Job seekers would pay hundreds of dollars for identification that would get them jobs at Pilgrim's Pride.
The workers arrested in the latest roundup are from Mexico, Guatemala, Honduras, El Salvador and Colombia.
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