The FBI knew foreign agents had access to Hillary Clinton's emails - including at least one classified one - before then-director James Comey declared no charges would be filed against her for using a private email server.

The House Judiciary and Oversight committees, in a memo obtained by Fox News, outlined their findings in their separate investigation on decisions made by the Department of Justice in 2016 and 2017.

'Foreign actors' obtained access to some of Clinton's emails - including at least one classified as 'secret' - according to the memo, which cites an internal FBI email as evidence.

Foreign agents got access to Hillary Clinton's email, including one classified as secret

The FBI knew of the email intrusion seven weeks before James Comey declined to press charges against Clinton

'Documents provided to the Committees show foreign actors obtained access to some of Mrs. Clinton's emails -- including at least one email classified 'Secret,'' the memo says, adding that foreign actors also accessed the private accounts of some Clinton staffers.

The memo addresses key findings of the committees' investigation ahead of next week's hearing with Justice Department Inspector General Michael Horowitz.

The IG released his highly anticipated report on the Clinton email case on Thursday.

The memo is short on details. It does not say who the foreign actors are or what material was obtained.

But it does say that secret information can 'reasonably be expected to cause serious damage to the national security.'

A May 2016 email from FBI investigator Peter Strzok shows the agency knew at that time some classified information had been hacked from Clinton's private server.

Strzok was one of the agents whose texts about seeking to keep Trump from being elected were made public to a great fury.

But the concerns about Clinton's private email server go back to when its existence was revealed in March 2015 by the New York Times.

There were questions as to whether it was secure enough to fight off foreign hackers. And its existence was a dominate thread of the 2016 presidential campaign.

But then-FBI Director James Comey, in his July 2016 statement on the Clinton case, did not go as far as Strzok in addressing the possibility of foreign intruders getting access to Clinton's server.

At the time, he said: 'We do assess that hostile actors gained access to the private commercial email accounts of people with whom Secretary Clinton was in regular contact from her personal account.'

But he said the FBI would not recommend charges be filed. However, he did say Clinton had been 'extremely careless' in her handling of classified information.

Comey, days before the election, announced he would revisit the probe after the discovery of new emails, a move that the Clinton camp has blamed for her loss.

In the House memo, lawmakers questioned whether the DOJ and FBI properly interpreted the law surrounding mishandling of classified information.

The committees' memo also says it appears the outcome of the investigation was 'predetermined' in May, two months before Comey's press conference and before multiple interviews had taken place.

It also accuses Comey of getting ahead of the DOJ on the final decision on whether to prosecute Clinton.

Comey was subject to a hash inspector general report that came out Thursday

Clinton's private mail server was a huge issue in the 2016 campaign

'Mr. Comey, as the FBI Director, was the chief investigator, not the prosecutor. It was not up to him to determine what a 'reasonable prosecutor' would do with the evidence the FBI had collected,' the memo says.

The IG's report that came out Thursday afternoon 'did not find documentary or testimonial evidence that improper considerations, including political bias, directly affected the specific investigative actions we reviewed.'

The 500-page report also found that Comey 'deviated' from the standard practices of his agency when dealing with the probe into Clinton's classified emails.

But Horowitz emphasized that Comey was more knuckleheaded than malicious.

'While we did not find that these decisions were the result of political bias on Comey's part, we nevertheless concluded that by departing so clearly and dramatically from FBI and department norms, the decisions negatively impacted the perception of the FBI and the department as fair administrators of justice,' the report reads.

Horowitz wrote that the Clinton saga was 'not the first time the [DOJ] and the FBI have conducted a politically-charged investigation and it will not be the last.'