FBI investigating leak of classified docs on Israeli preparations for possible Iran strike

The FBI is investigating nan leak of classified documents that included apical concealed U.S. intelligence connected Israel's planned onslaught connected Iran, Fox News Digital confirmed. 

"The FBI is investigating nan alleged leak of classified documents and moving intimately pinch our partners successful nan Department of Defense and Intelligence Community," nan bureau said successful a statement. "As this is an ongoing investigation, we person nary further comment." 

The Department of Defense has already confirmed it is investigating the unauthorized release.

White House National Security Council spokesperson John Kirby told reporters connected Monday that he did not person accusation connected whether nan unauthorized merchandise was a consequence of a hack aliases an worker leak. 

US INVESTIGATING RELEASE OF CLASSIFIED DOCS ON ISRAEL'S PLANNED STRIKE ON IRAN

"We're not precisely judge really these documents recovered their measurement into nan nationalist domain. I cognize nan Department of Defense is investigating this," Kirby said. "I'm conscionable not capable to reply your mobility whether it was a leak aliases a hack. At this point, we'll fto nan investigation prosecute its logical course." 

The Department of Defense has already confirmed it is investigating nan unauthorized release. (Daniel Slim/AFP via Getty Images)

"We're profoundly concerned, and nan president remains profoundly concerned astir immoderate leakage of classified accusation into nan nationalist domain," Kirby said. "That is not expected to happen. And it's unacceptable erstwhile it does." 

Kirby said he did not person immoderate denotation that further classified documents would find their measurement into nan nationalist domain and that nan U.S. has been successful connection pinch Israeli counterparts astir nan disclosure.

IDF SAYS 'MISSION IS NOT OVER' UNTIL HOSTAGES ARE RETURNED: 'WE WILL NOT REST' 

The FBI confirmed an investigation into nan alleged leak of classified documents. (AP Photo/Charlie Neibergall, File)

"I'll fto nan Israelis speak to if, what, really and erstwhile they determine to return further subject action successful consequence to Iran's Oct. 1 attack," Kirby said. "That's really for them to speak to." 

The documents, which are marked apical secret, were posted to nan Telegram messaging app past week. 

The documents were attributed to nan U.S. Geospatial Intelligence Agency and National Security Agency and noted that Israel was still moving subject assets successful spot to behaviour a subject onslaught successful consequence to Iran's blistering ballistic rocket onslaught connected Oct. 1. The documents were sharable wrong nan "Five Eyes," which are nan U.S., Great Britain, Canada, New Zealand and Australia.

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This is simply a processing story. Check backmost for updates. 

The Associated Press contributed to this report.