Originally posted on The New York Times by Sheera Frenkel, Matthew Rosenberg, and Nicholas Confessore on April 10, 2018.

Facebook has said that political data firm Cambridge Analytica improperly harvested the public profile data of up to 87 million of its users, including their political beliefs, interests and friends’ information.

Now the social network has revealed that the extent of the harvesting went eve further – it included people’s private messages, too.

On Monday, Facebook began informing people whose data may have been compromised by Cambridge Analytica through an app developed by the researcher Aleksandr Kogan. In its notifications, Facebook said that while the information harvested was largely limited to what was on people’s public profiles, a small number of people” also shared information from their Facebook timeline, posts, and messages.

Facebook did not specify how many people’s messages were gathered and said it was taking as broad a view as possible when notifying people that their data may have been taken.

How Can I Tell If My Information Was Obtained by Cambridge Analytica?

THE HANNON LAW FIRM HAS FILED A LAWSUIT AGAINST FACEBOOK FOR THIS BREACH OF INFORMATION

On April 2, 2018, The Hannon Law Firm, LLC and co-counsel filed suit against Facebook, Cambridge Analytica, SLC Group and Global Science Research seeking relief for all persons who own Facebook accounts in the United States and whose personal information was obtained by Cambridge Analytica, SLC Group, and/or Global Science Research.

WHAT SHOULD I DO?

If your personal Facebook information was shared with Cambridge Analytica, we are here to help. We would welcome the opportunity to talk to you about your concerns and experience. Contact us by calling 303-861-8800, or by filling out the contact form below.