A Russian “troll farm” paid $100,000 to Facebook for about 3,000 political ads during the 2016 presidential campaign, representatives of the social media giant told members of Congress.

The testimony provides additional evidence of Russian tampering, as investigations by both houses of Congress and special counsel Robert Mueller examine Kremlin-backed meddling in the 2016 election.

Few of the ads named either Hillary Clinton or Donald Trump, according to a blog post published Wednesday evening by Facebook’s chief security officer. Instead, they focused on divisive issues such as immigration, gun rights, and civil rights for LGBT Americans. Facebook says it shut down more than 470 fake accounts and pages linked to the Russian company, the Internet Research Agency. It also refused to release any of the ads, citing data policy and federal law.

After Facebook’s disclosure, Sen. Mark Warner (D) of Virginia called for reform so that Americans can be aware of who paid for the ads they see on social media sites, similar to political advertising on TV. 

In 2015, The New York Times did a deep-dive profile of the Internet Research Agency. Among its earlier hoaxes: a fake explosion at a chemical plant in Louisiana and a made-up Ebola outbreak in Atlanta. 

For voters who want to be sure they’re getting information from credible reports, here’s how to read like a fact-checker. 

Now to our five stories for today.