Federal officials are looking into reports that a personal AOL email account belonging to CIA Director John Brennan may have been hacked by a high school student, a senior official told NBC News on Monday.
"We are aware of the reports on social media, and we are referring to the appropriate authorities," the senior official said.
An FBI spokesperson declined to comment to NBC News on Monday.
Questions over a possible hacking of a private email account belonging to the CIA director arose late Sunday after the New York Post published a story in which a hacker claimed to have gained access to the account. Described by the Post as a "stoner high school student," the individual claimed to have taken documents that included the Social Security numbers of top intelligence officials, among other information.
Senior officials confirm to NBC News reports that among the documents that may have been taken is a Standard Form 86, which is used in applying for security clearances. The lengthy document includes intimate details on the applicant's personal life, as well as information on family, friends and business contacts.
The senior officials tell NBC News there is no indication any classified material was taken.
Some of the documents reportedly obtained from the private email account go back prior to Brennan's White House service as President Obama's top counter-terrorism adviser on the National Security Council.
The documents may include his previous tenure at the CIA, when Brennan led the National Counter-Terrorism Center.
Brennan has been active in the intelligence community for most of his career, except for three years spent working in private industry from 2005 to 2008.
In the interview with the New York Post, the hacker also claimed to have broken into the Comcast account of Homeland Security Secretary Jeh Johnson and that he listened to Johnson's voicemails.
"We are aware of the media report. However, as a matter of policy, we do not comment on the secretary's personal security," a DHS spokesperson said Monday.