The cyberattack targeting Democratic politicians was more widespread than originally believed, The New York Times reported Wednesday.

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The likely Russian cyberattack breached the private email accounts of more than 100 party officials and groups, sources told the Times.

Email accounts of Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonBiden leads Trump by 36 points nationally among Latinos: poll Democratic super PAC to hit Trump in battleground states over coronavirus deaths Battle lines drawn on precedent in Supreme Court fight MORE's campaign officials, party operatives and Democratic Party organizations seem to have been the focus of the attack.

The FBI is now widening its investigation, and officials have started to tell Democrats that Russians might have gained access to their email accounts.

It was previously reported that Russian hackers accessed the networks of the Democratic National Committee (DNC) and the Democratic Congressional Campaign Committee, and the Clinton campaign's network was also believed to have been breached.

But the hack may also have extended to other organizations such as the Democratic Governors Association, according to the Times.

Ahead of the Democratic National Convention last month, a trove of emails was released by WikiLeaks that appeared to show officials at the DNC planning ways to undermine Sen. Bernie Sanders Bernie SandersNYT editorial board remembers Ginsburg: She 'will forever have two legacies' Two GOP governors urge Republicans to hold off on Supreme Court nominee Sanders knocks McConnell: He's going against Ginsburg's 'dying wishes' MORE's (I-Vt.) presidential campaign.

The emails resulted in the resignation of former DNC Chairwoman Debbie Wasserman Schultz and other top officials.

Last week, FBI officials briefed staff members of the House and Senate Intelligence committees on its investigation into the issue and are expected to brief other congressional committees in the coming days.

During the briefing, officials reportedly talked about the high probability that the Russian government was behind the cyberattack.

Officials are still trying to figure out a motive.

The founder of WikiLeaks, Julian Assange, has pushed back against accusations that he published the emails of the Democratic Party leaders to hurt Clinton.

"We are very interested in power and publishing the truth about power so people can work out however they choose so they can reform power," he said.