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ST. LOUIS, MO (KTVI) – An internal review at the Illinois Department of Corrections is underway, after a data breach involving more than 1,000 employees.

Social security numbers, names, positions and salaries of employees from the Dixon and Lawrence correctional facilities were accidentally released to a private citizen through a Freedom of Information Act request.

The information was then mailed to an inmate. It was caught at the mailroom during a routine inspection.