Earlier this month, Facebook admitted that it sold at least $100,000 worth of ads that led to fake news pages during the elections. Both the inauthentic accounts and the advertisers that paid for the ads operate out of Russia. The social network also admitted that it wasn't equipped to filter out those kinds of advertisements -- its contractors were only on the lookout for violent and sexually explicit materials. CNN says Facebook already handed evidence over to special counsel Robert Mueller and his team to help them uncover who's behind the ads.

Committee Chairman Richard Burr, however, believes that "Facebook has been less than forthcoming on potentially how they were used." The panel still has to decide the scope of the hearing and when it will take place, but based on Burr's statement, Facebook's reps may have to prepare for a grilling.