BLOOMFIELD HILLS, Mich. (AP) — The Bloomfield Hills School District has accidentally revealed the names and Social Security numbers of 321 employees to two district parents following a Freedom of Information Act request.

The Detroit Free Press reports Tuesday that one of the parents found the data partially hidden on a Microsoft Excel file and informed Superintendent Rob Glass in person March 12.

The request sought the number of staff whose salaries and benefits totaled $100,000 or more. The district says the parents destroyed the files containing the data.

The district says it has purchased identity theft protection for the employees.

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Information from: Detroit Free Press, http://www.freep.com