1940 GMT: The Plot. President Ahmadinejad has used an interview with Al Jazeera English tonight to deny any Iranian involvement in the plan to kill the Saudi Ambassador to the US: "Terror is for people... who don't have any logic. People of Iran are pro-logic."
Speaker of Parliament Ali Larijani has tried a different approach, declaring that the main suspect in the US, Manssor Arbabsiar, is "addicted to opium and drunken and mentally not well balanced".
1640 GMT: The Plot. Minister of Defense Ahmad Vahidi has insisted that Iran is the most secure and stable country in the world today and that US accusations of Tehran's attempt to kill the Saudi Ambassador in Washington are "an intelligence disgrace".