Social media giant Facebook is being investigated for possible antitrust violations by state attorneys general from eight states and Washington, D.C., New York Attorney General Letitia James announced Friday morning.

The investigation, led by New York, follows the launch of a probe into Facebook over the same issue by the Federal Trade Commission, the company confirmed in July.

The federal agency had previously approved a fine of $5 billion against Facebook earlier this year for allegedly mishandling the personal data of its users, including when that information was exposed to political analysis firm Cambridge Analytica during the 2016 elections.