Critics making those accusations say the White House did it to improve President Barack Obama's re-election chances.
The president shot back calling the claims "offensive" and "wrong."
"The notion that my White House would purposely release classified national security information is offensive. It's wrong," Mr. Obama told reporters at a news conference Friday. "And people I think need to have a better sense of how I approach this office and how the people around me here approach this office."
He promised an internal investigation into the leaks about U.S. involvement in cyberattacks on Iran and drone strikes on suspected terrorists. The leaked information generally painted Mr. Obama as a decisive and hands-on commander in chief.
Three weeks ago, FBI Director Robert Mueller said the bureau had launched an investigation into who leaked information about an al Qaeda plot to place an explosive device aboard a U.S.-bound airline flight. Separately, calls from Capitol Hill have mounted urging a leak probe into a New York Times story a week ago about U.S. involvement in cyberattacks on Iran.
Mr. Obama said his administration has "zero tolerance" for such leaks and that there would be an internal administration probe.
The Associated Press contributed to this report.
