Facebook estimates 10 million people in the U.S. saw at least one politically charged ad purchased by bogus Russian-linked accounts.
Let's back up: In early September, Facebook revealed it discovered that inauthentic Russian-linked accounts bought around $100,000 worth of ads on the site.
Then, special counsel Robert Mueller reportedly used a warrant to obtain the ads and get information about who bought them.
Facebook shared the ads with Congress Monday and released more details. The social media company estimates 44 percent of the Russian-linked ads were displayed before the 2016 presidential election and 56 percent after the election.
Most of the ads focused on divisive political and social issues, like LGBTQ matters, race, immigration and gun rights.
Facebook says it's possible that more "bad actors" exist on the platform. The company says it hopes working with the special counsel and Congress will solve the issue.