Azerbaijan, Baku, Oct. 18 / Trend D.Khatinoglu/
"We accept the U.S. alleged plot only as a claim, but Iran is ready to get documents and evidences of Washington's allegation to probe, IRİNN TV reported quoting Iranian Foreign Ministry spokesman Ramin Mehmanparast as saying.
"The U.S. threatens Iran by tightening sanctions and military interference without proving the alleged plot and submitting the evidences to Iran," he said.
Mehmanparast added that U.S. hastiness demonstrates that its allegation is only a scenario and confusion in its foreign policy.
"We have not received any document or evidence from the U.S. yet to probe," he underscored.
Earlier, in an exclusive interview with Al Jazeera in Tehran on Monday, Iranin president Mahmoud Ahmadinejad said that anyone who hears the claims "laughs", but warned the US to be mindful of the allegations it makes.
Ahmadinejad said that Tehran would not launch an investigation into the matter.
Last week, the U.S. authorities said they had broken up plans by two men linked to Iranian Quds Force - a special unit of the Islamic Revolutionary Guard Corps (IRGC) - to assassinate Saudi Ambassador to Washington Adel al-Jubeir.
U.S. Attorney-General Eric Holder said the plot was masterminded, sponsored and directed from Iran, but declined to disclose details of the conspiracy and confirm that it was approved and ordered directly by Iranian authorities.
Iran denies the allegations saying the U.S. uses this tactic to slander again Iran. The IRGC also rejected any involvement of the Quds force in the plot alleged by the United States.
The two detainees are Manssour Arbabsiar, a 56-year-old naturalized US citizen with dual Iranian and U.S. passports, and Gholam Shakuri, who is based in Iran.
Iran and Saudi Arabia, a U.S. ally, are regional rivals. The U.S. and its allies accuse Iran of using its civilian nuclear program as a cover to develop nuclear weapons and are putting pressure to abandon it. Iran has denied the charges, saying its nuclear program is aimed at generating electricity and producing isotopes to treat medical patients.