The organization released a statement saying:

"Today, 21 October 2015 and over the coming days WikiLeaks is releasing documents from one of CIA chief John Brennan's non-government email accounts. Brennan used the account occasionally for several intelligence related projects."

A PDF titled John Brennan Draft SF86 appears to be Brennan's "Questionnaire for National Security Positions," which is an application for security clearance. The document not only contains what appears to be Brennan's passport number and home address, but also contains a section on his wife — including her social security number.

The number he had listed as his home phone number was in service, but went immediately to voice mail when Sputnik reached out for comment. The phone number listed as the best method to reach him during evenings was also in service and rang all the way through before transferring us to a voice mail.

A PDF titled "torture" contained a document sent by Christopher S. Bond to the United States Select Committee on Intelligence which stated that the controversial interrogation methods used on "high value" detainees has been one of the most valuable sources of intelligence in protecting America.

The letter requested that rather than authorizing intelligence agencies to use only techniques that are allowed, he wanted to make certain techniques prohibited, so that they knew exactly what they could not do, without being limited on new methods that may be developed in the future.

Screenshot/Wikileaks Torture memo from Christopher S. Bond

A PDF titled "Torture Ways," is the contents of a bill aimed to to prohibit the use of certain interrogation techniques such as, forced nudity, sexual acts, using hoods or duct tape over detainees eyes, beatings, electric shock, burns, using military dogs on the prisoners, waterboarding, inducing hypothermia or heat injuries, mock executions, and food/water/medical deprivation.

— jeremy scahill (@jeremyscahill) October 21, 2015

The person taking responsibility for the hack has claimed to be an American teenager and has asserted that there are six people who were involved in the breech. They have claimed that their efforts were because of their support for Palestine and opposition to US foreign policy.

"We are not doing this for personal satisfaction, we are doing this because innocent people in Palestine are being killed daily," the hacker Tweeted.

Earlier this week, the hacker used a now-suspended Twitter account to publish names, social security numbers, and phone numbers found in Brennan's email belonging to 20 people who worked for the Obama transition team in 2008.

The hacker claims that they used social engineering to trick workers at Verizon into providing Brennan's personal information, and using that to subsequently dupe AOL and Comcast into allowing access to their target's accounts.

WikiLeaks has stated that they will be releasing more content from Brennan's account in the coming days.