The Denver Post: Three social media companies are limiting access to their data by a software surveillance program used by the Denver Police Department and other law enforcement agencies around the country over concerns police may use it to monitor activists and protests.

Twitter, Instagram and Facebook each announced this week they were suspending or limiting access to their data by Geofeedia after an investigation by the American Civil Liberties Union of Northern California found law enforcement uses the software to monitor people who speak against them, especially those in minority communities.

“Social media monitoring is spreading fast and is a powerful example of surveillance technology that can disproportionately impact communities of color,” the ACLU of Northern California wrote in a post on its website.

Last week, the ACLU of Colorado raised similar concerns about the software’s use by Denver police, saying it could infringe of the free speech rights of people who are not suspected of criminal wrongdoing.

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