WASHINGTON — The Justice Department has dropped its investigation into a former department attorney who tipped off the media about the Bush administration’s warrantless eavesdropping program.

The department informed Thomas Tamm’s attorneys that he will not be prosecuted for the leak that then-President George W. Bush called a breach of national security.

Tamm has said he called The New York Times about the program because it “didn’t smell right” and he thought the public had a right to know.

The Times won the Pulitzer Prize for its 2005 story exposing the program designed to catch terrorists by eavesdropping on international phone calls and emails of U.S. residents without court warrants.

The decision not to prosecute Tamm was first reported Tuesday by Politico.