Computer systems connected to the campaign of Hillary Clinton, the Democratic presidential nominee, were hacked in an attack that appears to have come from Russia's intelligence services, a federal law enforcement official said Friday.
The FBI said that it was examining reports of "cyberintrusions involving multiple political entities" but did not identify the targets of the attacks. That statement came on the same day that the Democratic Congressional Campaign Committee, the House Democrats' fundraising arm, said its computer systems had been hacked.
The reports of attacks against Democratic Party organizations began in June, when the Democratic National Committee said its computer systems had been breached. That hack led to the release of some 20,000 emails by WikiLeaks, many of them embarrassing to Democratic officials, and the resignation of Debbie Wasserman Schultz, the Florida congresswoman who led the group.
The attacks on the Clinton campaign and the Democratic congressional committee were first reported by Reuters.
In a statement released late Friday, the FBI said that it "is aware of media reporting on cyberintrusions involving multiple political entities, and is working to determine the accuracy, nature and scope of these matters."