https://techcrunch.com/2019/01/31/facebook-iran-2019/

Facebook just announced its latest round of “coordinated inauthentic behavior,” this time out of Iran. The company took down 262 Pages, 356 accounts, three Facebook groups and 162 Instagram accounts that exhibited “malicious-looking indicators” and patterns that identify it as potentially state-sponsored or otherwise deceptive and coordinated activity.

As Facebook Head of Cybersecurity Policy Nathaniel Gleicher noted in a press call, Facebook coordinated closely with Twitter to discover these accounts, and by collaborating early and often the company “[was] able to use that to build up our own investigation.” Today, Twitter published a postmortem on its efforts to combat misinformation during the US midterm election last year.