MINNEAPOLIS (AP) — Federal investigators are looking into complaints of harassment and bullying in the Anoka-Hennepin School District.

A spokeswoman with the Department of Justice says it’s conducting a joint investigation with the Department of Education. The investigation has been going on since last fall.

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The Anoka-Hennepin district says it received a letter in November about the investigation. Since then, the district has cooperated with investigators, providing documents and interviews.

District spokesman Brett Johnson says the district and investigators have the same goal: to keep kids safe.

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In October, the district changed its anti-bullying and anti-harassment policies after six students committed suicide over a year and a half. The district’s own investigation found no evidence that bullying contributed to the deaths. But some family members and advocates disagreed.

The school district is the state’s largest.

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