As revelations from the anti-secrecy group WikiLeaks continue to surface, the FBI's investigation into the Clinton Foundation, which has been underway for more than a year, has become "a very high priority" case, according to two sources with detailed knowledge of the probe.

Even before WikiLeaks began releasing its treasure trove of emails allegedly linked to Hillary Clinton and her presidential campaign, the FBI had collected quite a bit of information. Needless to say, the stockpile of data is now plentiful.

"There is an avalanche of new information coming in every day," one source, who acknowledged that some of WikiLeaks' findings have been added to the FBI's records, told Fox News Wednesday.

Other sources said FBI agents are now "actively and aggressively pursuing this case" and will be re-interviewing several of the people the bureau initially contacted, some now for the third time. The agency has interviewed several people linked to the case, which is investigating potential pay-for-play interaction between then-Secretary of State Clinton and the Clinton Foundation.

FBI officials are currently combing through comments made by Clinton and her top aides in previous discussions as well as reviewing the FBI 302, official documents agents use to outline interviews they've conducted, to ensure the notes match the comments made.

The FBI's White Collar Crime Division is handling the probe.