The FBI monitored social media on Election Day 2016 to try and trace the source of a suspected Russian disinformation campaign that used "fake news," CNN reports.
In the months leading up to Election Day, Twitter and Facebook were the feeding grounds for viral "news" stories floating conspiracies and hoaxes, many aimed at spreading negative false claims about Hillary Clinton.
On Election Day, dozens of agents and analysts huddled at a command center arrayed with large monitoring screens at the FBI headquarters in Washington watching for security threats, according to multiple sources.
That included analysts monitoring cyber threats, after months of mounting Russian intrusions targeting every part of the US political system, from political parties to policy think-tanks to state election systems.
On this day, there was also a group of FBI cyber and counterintelligence analysts and investigators watching social media.
FBI analysts had identified social media user accounts behind stories, some based overseas, and the suspicion was that at least some were part of a Russian disinformation campaign, according to two sources familiar with the investigation.
No comment from FBI for CNN's story.