SOUTHFIELD (WWJ) – Police are investigating a threat made Thursday on social media at Michigan Technological University.

Police say a person anonymously posted on the social media site called Yik Yak, a message board where users can post comments to a specific community.

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The post threatens the lives of African Americans. Police are in communication with Yik Yak to try to find out the person behind the message.

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Michigan Tech’s President, in a statement, says “we are a community and will not tolerate threats to any member of our family.”

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Details of the threat have not been made public.