investigation found more than 3,000 election-related ads, tsting more than $100,000, paid for by a russian company with links to the kremlin. facebook said, "the vast majority of ads didn't specifically reference the u.s. presidential election or a particular candidate, but sppeared to focus on amplifying divisive social and political messages." the ads have not been made public but will now be turned over to congressional investigators. for months, however, facebook denied there was any evidence that russians had paid for election-related advertising. senator mark warner is vice chairman of the senate intelligence committee. >> i feel like facebook finally has been responsive, but the proof will be in the extent of the materials they give us next week, and then will they continue to work with us to identify other sites that may have originated in russia. they've identified one russian troll farm. >> reporter: the identity of ad buyers should not have been a