A Russian cyberattack that targeted Democratic politicians was bigger than it first appeared and breached the private email accounts of more than 100 party officials and groups, officials with knowledge of the case said Wednesday.
The widening scope of the attack has prompted the F.B.I. to broaden its investigation, and agents have begun notifying a long list of Democratic officials that the Russians may have breached their personal accounts.
The main targets appear to have been the personal email accounts of Hillary Clinton’s campaign officials and party operatives, along with a number of party organizations….
American intelligence agencies have said they have “high confidence” that the attack was the work of Russian intelligence agencies. It has injected a heavy dose of international intrigue into an already chaotic presidential campaign as Democrats have alleged that the Russians are trying to help tilt the election toward the Republican nominee, Donald J. Trump.