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Sam Lavigne — a New York University professor who associates himself with the far-left-leaning group Antifa — reportedly posted a database of personal information of more than 1,500 Immigration and Customs Enforcement (ICE) employees, according to Fox News.

Lavigne Tweeted that he got the information from LinkedIn.

The man posted the database to a site called GitHub, which soon thereafter removed the post.

“We removed the project because it violates our community guidelines,” a GitHub spokesperson told Fox News. “In general, we have policies against use of GitHub for doxxing and harassment, and violating a third party’s privacy.”