WASHINGTON (news24.com) - Most U.S. intelligence on Iran shared with the International Atomic Energy Agency has proved to be inaccurate and failed to lead to discoveries of a smoking gun inside the Islamic Republic, The Los Angeles Times reported on its website on Saturday.

Citing unnamed diplomats working in Vienna, the newspaper said the CIA and other Western intelligence services have been providing information to the IAEA since 2002.

But none of the tips about Iran's sites provided clear evidence that the Islamic Republic is developing a nuclear arms arsenal, the report said.

"Since 2002, pretty much all the intelligence that's come to us has proved to be wrong," the paper quotes a senior IAEA diplomat as saying.

Another official described the agency's intelligence stream as "very cold now" because "so little panned out," The Times reported.

U.S. officials privately acknowledge that much of their evidence on Iran's nuclear programs remains ambiguous, fragmented and difficult to prove, the report said.