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Attorneys general from eight states and the District of Columbia have launched a formal investigation into Facebook over anti-competitive practices, the New York attorney general's office confirmed Friday morning.

The probe will look into whether Facebook "endangered consumer data, reduced the quality of consumers' choices, or increased the price of advertising," said New York Attorney General Letitia James 

The antitrust investigation is part of a larger review that's being coordinated with attorneys general in Colorado, Florida, Iowa, Nebraska, North Carolina, Ohio, Tennessee and the District of Columbia.

"Even the largest social media platform in the world must follow the law and respect consumers," James said.

This is all happening at a time when Facebook has agreed 

 to the Federal Trade Commission for failing to protect user data from broad sharing with third-party apps, among other problems.

And the Justice Department said earlier this summer that it's launching a similarly wide-ranging antitrust review of big tech companies. The DOJ didn't name specific firms in 

, but it was the first clear public confirmation of a major U.S. antitrust review of the tech industry. 

The Justice Department said its antitrust division will look at how major online platforms have grown their share of market power and whether they are acting in ways that have "reduced competition, stifled innovation, or otherwise harmed consumers."

A request for comment from Facebook was not immediately returned.

 Facebook is among NPR's financial supporters.

Technology

Jennifer Liberto

Author

Attorneys general from eight states and the District of Columbia have launched a probe into Facebook and its market dominance. The Justice Department has also launched an antitrust review of big tech.

Is Facebook too big? State attorneys general want to know

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