https://arstechnica.com/information-technology/2018/07/facebook-takes-on-inauthentic-meddlers-ahead-of-major-dc-protest-next-week/

Facebook took the unusual step of announcing an ongoing, incomplete investigation into "inauthentic" behavior on Tuesday, complete with implications that Russia's Internet Research Agency (IRA) may have been involved. This week's disclosure comes in part due to Facebook having to reveal its hand a bit prematurely: "32 Pages and accounts" were affiliated with a protest event scheduled for next week in Washington, DC, and Facebook has begun informing its potential attendees.

The 3,000+ users who expressed interest in the "No Unite The Right 2" event between August 10-12 in Washington, DC, will receive the following Facebook message today: "A Page created by fake accounts started the event 'No Unite The Right 2 - DC.' The other event hosts have been notified."