https://techcrunch.com/2018/08/21/facebook-and-twitter-remove-hundreds-of-accounts-linked-to-iranian-and-russian-political-meddling/

Facebook has removed hundreds of accounts and pages for what it calls “coordinated inauthentic behavior,” generally networks of ostensibly independent outlets that were in fact controlled centrally by Russia and Iran. Some of these accounts were identified as much as a year ago.

In a post by the company’s head of cybersecurity policy, Nathaniel Gleicher, the company described three major operations that it had monitored and eventually rolled up with the help of security firm FireEye. The latter provided its own initial analysis, with more to come.