Iran says it is ready to study U.S. allegations of an Iranian plot to kill the Saudi Arabian ambassador in the United States.

The state-run IRNA news agency said Monday that Iranian Foreign Minister Ali-Akbar Salehi has urged the U.S. to present Iran with any existing documents in the case.

Iran has denied the allegations, and Supreme Leader Ayatollah Ali Khamenei said Sunday that any “inappropriate” political or security-related action by the United States on the issue will bring a “decisive response.”

He also said the U.S. allegations are an attempt to divert attention from its financial problems and protests at home.

U.N. Secretary-General Ban Ki-moon said Monday he has received letters about the alleged plot from Iran, the U.S. and Saudi Arabia. He said he has forwarded the letters to the Security Council for its consideration.

Iran faced criticism at the U.N. Monday on women's rights issues and its inability to provide data on executions. Experts at the U.N. slammed Iran for sentencing Iranians to death for being gay or non-Muslim.

Sunday, Iranian President Mahmoud Ahmadinejad said Iranians are civilized and do not need to resort to assassination.

The highest-ranking U.S. Senator on intelligence matters, Diane Feinstein, told Fox News Sunday that U.S. authorities have collected ample evidence showing the involvement of Iran's elite Quds force in the plot.

Last Tuesday, the U.S. Justice Department announced it had broken up an alleged Iranian plot to assassinate Saudi Ambassador to the U.S., Adel al-Jubeir. Officials said the U.S. had filed charges against two Iranians for involvement in the plot. Officials said one suspect was part of Iran's elite Quds Force.

On Friday, U.S. State Department spokeswoman Victoria Nuland said Washington had a direct meeting with Iranian officials over the alleged plot. She told reporters the meeting was to make it “absolutely clear” that the U.S. considers the alleged plot “unacceptable” and a violation of U.S. and international law.