Facebook representatives told congressional investigators Wednesday that the social-media titan unknowingly sold political ads to a Russian “troll farm” during the 2016 election, The Washington Post reported. Company officials said they discovered that the Russian company, which has a history of pushing pro-Kremlin propaganda, purchased $100,000 worth of ads on the site. Most of the ads reportedly pushed politically divisive issues, like gun rights, immigration fears, gay rights, and racial discrimination. Facebook began investigating purchasers of politically-motivated ads on its site this past spring. So far it has reportedly found that the Russian company was connected to 3,300 ads.