President Biden is "deeply concerned" by the possible leak of U.S. intelligence documents regarding Israeli preparations for an attack on Iran, spokesman John Kirby said Monday.

Kirby said on Monday that the administration was still not certain if the classified information that became publicly disclosed was leaked or hacked.

The U.S. is investigating an unauthorized release of classified documents that assess Israel's potential plans to attack Iran.

President Joe Biden is “deeply concerned” about the release of classified documents on Israel’s preparation for a potential retaliatory attack on Iran, according to a White House spokesman. U.S. offic

President Joe Biden is "deeply concerned" about the unauthorized release of classified documents on Israel's preparation for a potential retaliatory attack on Iran, a White House spokesman said

Multiple news outlets have reported the exposure of highly classified U.S. intelligence material on Israel’s potential plans for a retaliatory attack on Iran.

The FBI said Tuesday that it is investigating the unauthorized release of classified documents on Israel’s preparation for a potential retaliatory attack on Iran. White House national security spokesman John Kirby said Monday that the Biden administration is still not certain if the classified information was leaked or hacked but that officials don’t have any indication at this point of “additional documents like this finding their way into the public domain.

White House national security spokesman John Kirby says President Joe Biden is “deeply concerned" about the unauthorized release of classified documents on Israel’s preparation for a potential retalia

Iran's envoy to the U.N. accused President Biden of a "dangerous provocation" in saying he knew of Israel's plans to strike.

Fox News senior national correspondent Rich Edson has the latest on concerns over intelligence ending up online on 'Special Report.'