FBI investigating apparent cyberattack on Clinton campaign

The FBI is investigating an apparent cyberattack on Hillary Clinton's presidential campaign, Fox News confirmed Friday.

The breach appears to be part of a series of cyberattacks targeting Democratic organizations, including the the Democratic National Committee (DNC) and Democratic Congressional Campaign Committee (DCCC).

The investigation was first reported by Reuters, which said that the Justice Department's national security division was investigating whether the cyberattacks threatened national security. 

A Clinton campaign official said a statement was expected later Friday.

An FBI statement did not mention the Clinton campaign specifically, but said it was aware of reporting "on cyber intrusions involving multiple political entities, and is working to determine the accuracy, nature and scope of these matters.

The report that Clinton's campaign was hacked comes a day after the cyberattack on the DCCC, which raises money for Democratic congressional candidates, was made public. Sources told Fox News Friday that the DCCC hack bears similarities to the recent breach of DNC files.

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The DNC breach led to the embarrassing leak of internal emails by WikiLeaks that appeared to show a pro-Clinton bias in the organization -- and, in turn, led to DNC Chairwoman Debbie Wasserman Schultz stepping down ahead of this week's Democratic National Convention.

The hack of the DCCC’s web server allowed the hackers to create and redirect traffic to a fake donations page, made to look and feel authentic, sources said. From there, hackers were able to capture all data entered on the page. Sources said the objective behind the hack is not clear, though it could be to harvest data on Democratic donors and supporters.

Additionally, Fox News has obtained analysis of the DCCC hack from private sector cybersecurity firm FireEye that suggests the intrusion was carried out by a Russian-government aligned hacking group dubbed "Tsar Team (APT28)."

In its research, FireEye notes it previously confirmed that malware analyzed from the DNC hack was also consistent with "Tsar Team" -- suggesting the group was involved in both attacks.

Tsar Team has also been implicated by FireEye in numerous cyberattacks aimed at foreign targets on behalf of the Russian government in the past.

Fox News' Matt Dean and Serafin Gomez contributed to this report.