https://www.recode.net/2017/10/1/16394288/facebook-russia-ads-congress-senate-house-mark-zuckerberg

Facebook will hand over approximately 3,000 political ads purchased by Russian sources during the 2016 U.S. presidential election to members of Congress on Monday.

Along with the ads, Facebook plans to share other data — including information about the users those ads targeted and how they were paid for — with the House and Senate Intelligence Committees, as well as the Senate Judiciary Committee, a spokesperson told Recode.