"No new centrifuge machine has been installed in Natanz facility," said Simorgh, responding to Boroujerdi's comments.
 
Diplomats have said inspectors from the UN watchdog, the International Atomic Energy Agency (IAEA), had concluded Iran was ready to start installing the centrifuges.
 
But they said timing the installation was likely to be a political decision. Moderate politicians in Iran, particularly critics of  Mahmoud Ahmadinejad, the president, have been counselling caution and possibly even suspending enrichment, until now a step opposed by Iran.
 
Ayatollah to have final say
 
Ahmadinejad has been blamed by critics for exacerbating the standoff with the West, although the final say in nuclear policy and other matters of state lies with Ayatollah Ali Khamenei, Iran's highest authority.
 
The US has said it would be a "miscalculation" if Iran believed it could install the 3,000 centrifuges and still avoid another UN resolution or further pressure.
 
Iran already operates two experimental cascades of 164 centrifuges, which spin at supersonic speeds to purify uranium.
 
The UN Security Council imposed sanctions on Iran on December 23 and gave the Islamic Republic 60 days to suspend uranium enrichment.