HOUGHTON, Mich. (WWJ/AP) – A charge of disturbing the peace against a Michigan Technological University student who authorities say threatened blacks on social media has been dismissed.

The misdemeanor charge against 21-year-old Matthew Shultz was dismissed without prejudice, meaning it can be brought again if new evidence is revealed.

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Shultz was arrested last month in the case. He was accused of making the threatening comments on a social media site called Yik Yak, an anonymous message board where users can post comments to a specific community. Police say the threats were directed at members of Michigan Tech’s black community.

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The university increased its police presence after the threats as a precautionary measure.

Prosecutor Michael Makinen told The Daily Mining Gazette that the investigation remains “ongoing.”

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