https://www.vox.com/policy-and-politics/2017/9/8/16274094/facebook-russia-troll-problem

The social media giant is vowing to crack down on fake accounts.

Facebook has acknowledged publicly that fake accounts linked to Russian sources bought $100,000 in political ads, accounting for over 3,000 ads. The announcement on Wednesday was the first time Facebook has acknowledged that many of the fake accounts it shut down came from Russian sources.