Hackers successfully compromised a computer network used by the Hillary Clinton campaign in what appears to be a widespread attack on Democratic organizations.

According to Reuters, who broke the story Friday, the U.S. Department of Justice national security division is currently looking into whether the attacks “threatened U.S. security.”

“The involvement of the Justice Department’s national security division is a sign that the Obama administration has concluded that the hacking was state sponsored…” Reuters reports.

The Department of Justice has not released a comment on the report thus far. The Clinton campaign claimed in a statement that no internal networks were accessed.

Clinton campaign statement: Internal network not hacked. DNC-hosted service breached in DNC hack. pic.twitter.com/IGe7AtDMxA — Eric Geller (@ericgeller) July 29, 2016

News of the breach comes only hours after the Democratic Congressional Campaign Committee (DCCC) announced that it had been hacked also.

The DCCC claims that like the Democratic National Committee (DNC), they too were targeted by Russian government backed hackers.

“Based on the information we have to date, we’ve been advised by investigators that this is similar to other recent incidents, including the DNC breach,” DCCC spokesperson Meredith Kelly said in a statement.

Although a growing amount of evidence points directly to Russia as the responsible party, many in the cybersecurity realm are waiting before placing blame.

“I don’t think we’re quite ready yet to make a call on attribution,” Director of National Intelligence James Clapper recently said. “We all know there’s just a few usual suspects out there, but in terms of the process we try to stick to, I don’t think we’re ready to make a public call on that yet.”

It is currently unknown what was accessed in both the DCCC and Clinton campaign hacks and whether or not Wikileaks is in possession of any of the data.

As noted by Yahoo News Thursday, the FBI “warned the Clinton campaign that it was a target of a cyberattack last March,” although the campaign appears to have brushed off the issue.

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