Facebook said on Tuesday that it had identified a political influence campaign that was potentially built to disrupt the midterm elections, with the company detecting and removing 32 pages and fake accounts that had engaged in activity around divisive social issues. The company did not definitively link the campaign to Russia. But Facebook officials said some of the tools and techniques used by the accounts were similar to those used by the Internet Research Agency, the Kremlin-linked group that was at the center of an indictment this year alleging interference in the 2016 presidential election. Facebook said it had discovered coordinated activity around issues like a sequel to last year’s deadly “Unite the Right” white supremacist rally in Charlottesville, Va. Activity was also detected around #AbolishICE, a left-wing campaign on social media that seeks to end the Immigration and Customs Enforcement agency.
“At this point in our investigation, we do not have enough technical evidence to state definitively who is behind it,” said Nathaniel Gleicher, Facebook’s head of cybersecurity policy. “But we can say that these accounts engaged in some similar activity and have connected with known I.R.A accounts.”
The jolting disclosure, delivered to lawmakers in private briefings on Capitol Hill this week and in a public Facebook post on Tuesday, underscored how behind-the-scenes interference in the November elections had begun.
In recent weeks, there have been reports of other meddling, including a Daily Beast report that the office of Claire McCaskill of Missouri, one of the Senate’s most vulnerable Democrats up for re-election this fall, was unsuccessfully targeted by Russian hackers last year, which Ms. McCaskill confirmed. American intelligence officials have indicated that at least one other unnamed Democratic senator up for re-election has been targeted.