Iran says happy to examine US plot allegations

* Foreign minister asks Washington to send evidence of plot

* Says nuclear programme survived scientist's assassination

* "Almost nothing" Iran can't achieve in nuclear field

By Ramin Mostafavi

TEHRAN, Oct 17 (Reuters) - Iran said on Monday it would examine "seriously and patiently" U.S. allegations it planned to assassinate a Saudi ambassador and called on Washington to send evidence of the plot it has dismissed as baseless propaganda.

"We are prepared to examine any issue, even if fabricated, seriously and patiently, and we have called on America to submit to us any information in regard to this scenario," Foreign Minister Ali Akbar Salehi was quoted as saying by the official IRNA news agency.

U.S. authorities said last week they had foiled a plot to kill Saudi's ambassador to Washington, Adel al-Jubeir, and had arrested an Iranian-U.S. joint national -- news that raised tensions between Tehran, its Arab neighbours and the West.

President Barack Obama said the foiled plot should lead to tighter sanctions against Iran -- already under several rounds of U.N. sanctions over its nuclear programme -- and repeated that all options are on the table to deal with the Islamic republic, a tacit threat of possible military action.

U.N. Secretary-General Ban Ki-moon said on Monday he had passed correspondence about the U.S. suspicions of Iran's involvement in the alleged plot to the U.N. Security Council.