Dozens of FBI officials monitored social media on Election Day 2016 looking for “fake news” being spread as part of a Russian disinformation campaign against former candidate Hillary Clinton, multiple sources told CNN.

The FBI knew it was walking a fine legal line by monitoring the media for “fake news,” according to sources. It was part of a larger effort to look for Russian cyber threats to the elections, CNN reported.

“We were right on the edge of Constitutional legality,” a source briefed on the matter told CNN. “We were monitoring news.”

Intelligence officials monitoring social media held conference calls with the White House throughout Election Day. Some minor issues came up, but nothing happened to disrupt voting. (Read more from “‘Edge of Constitutional Legality’: Obama White House Oversaw Election Day News Monitoring” HERE)

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