Iowa ? Two supervisors at an Iowa meatpacking plant that was raided by federal immigration agents in May were arrested and charged with encouraging people to live in the United States illegally.

Juan Carlos Guerrero-Espinoza, 35, and Martin De La Rosa-Loera, 43, were also charged Thursday with and aiding and abetting the possession and use of fraudulent identification. Guerrero-Espinoza was charged with aiding and abetting aggravated identity theft.

Federal immigration officials raided Agriprocessors, the nation’s largest kosher meatpacking plant, on May 12. Nearly 400 workers were detained and dozens of fraudulent permanent resident alien cards were seized from the plant’s human resources department, court records said.