WASHINGTON Computer systems connected to the campaign of Hillary Clinton, the Democratic presidential nominee, were hacked in an attack that appears to have come from Russias intelligence services, a federal law enforcement official said on Friday.
The F.B.I. 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 fund-raising 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 F.B.I. 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.
The cyberthreat environment continues to evolve as cyberactors target all sectors and their data, it continued. The F.B.I. takes seriously any allegations of intrusions, and we will continue to hold accountable those who pose a threat in cyberspace.
It is unclear whether the reported breaches at the D.N.C., the Clinton campaign and the Democratic congressional committee were part of a single, coordinated attack or a series of attacks aimed at the Democrats, said the law enforcement official, who spoke on the condition of anonymity.
Were trying to figure all that out, the official said. With the presidential campaign entering its final stage, the official said, this seems to be the environment that were in right now, and we want to determine whats going on.
