Russian hackers used Facebook ads to pit different social, racial and political groups against one another. Photo: Joerg Koch / AP

Last week, Facebook said it was planning to turn more than 3,000 ads bought by Russian operatives during the 2016 campaign over to congressional investigators. On Monday, the Washington Post reported on details of some of the ads, which pitted different social groups against one another. For example, some of the Russian ads promoted groups like Black Lives Matter, while others warned that those groups pose a dangerous threat to society.

Between the lines: Russian hackers, who worked off of evolving lists of racial, religious, political and economic themes, were able to take advantage of the ability to send targeted messages to different Facebook users based on their political and demographic affiliations. The aim appears to have been to inflate tension between already feuding groups.

Facebook declined to comment, but referred Axios to its earlier update, which noted that "the ads and accounts appeared to focus on amplifying divisive social and political messages across the ideological spectrum."

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In photos: Thousands evacuated as Southern California fire grows

A plane makes a retardant drop on a ridge at the Apple Fire north of Banning in Riverside County, which "doubled in size" Saturday, per KTLA. Robert Gauthier / Los Angeles Times via Getty Images

A massive wildfire that prompted mandatory evacuations in Southern California over the weekend burned 26,450 acres and was 5% contained by Monday afternoon, the California Department of Forestry and Fire Protection said.

The big picture: As California remains an epicenter of the coronavirus pandemic in the U.S., some 15 separate fires are raging across the state. About 7,800 people were under evacuation orders from the Apple Fire, about 75 miles east of Los Angeles, as hundreds of firefighters battled the blaze. CalFire said Monday that a malfunction involving a "diesel-fueled vehicle emitting burning carbon from the exhaust system" started the Apple Fire.

Twitter faces FTC fine of up to $250 million over alleged privacy violations

Photo: Rafael Henrique/SOPA Images/LightRocket

The Federal Trade Commission has accused Twitter of using phone numbers and emails from its users to make targeted ads between 2013 and 2019, Twitter said in an SEC filing published Monday.

Why it matters: Twitter estimates that the FTC's draft complaint, which was sent a few days after its Q2 earnings report, could cost the company between $150 million and $250 million. The complaint is unrelated to the recent Twitter hack involving a bitcoin scam.