BOSTON (AP) — Federal prosecutors are launching an investigation into allegations of civil rights violations at a prestigious Boston high school that’s the nation’s oldest public school.

The local U.S. attorney’s office announced Wednesday its Civil Rights Unit would look into concerns about racial harassment and discrimination at Boston Latin School, which was founded April 23, 1635.

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Community members and civil rights organizations including the ACLU of Massachusetts submitted a written complaint to the office last month.

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The Boston Globe reports the school district has investigated several race-related incidents. In one case, a student threatened to lynch a 15-year-old black female classmate and called her a racial slur. An investigation report says it was the only case in which the school failed to adequately respond.

A spokesman for the school district says he can’t comment on matters involving students.

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