https://www.theguardian.com/technology/2017/nov/16/facebook-must-share-information-on-russian-interference-in-uk

Social network is urged to reveal what it knows as expert says it is unlikely Russian professional trolls only used Twitter

Facebook is under pressure from academics and parliamentarians to reveal what it knows about Russian attempts to manipulate British politics, as research efforts flounder against the company’s locked-down social network.