Ali Akbar Salehi, a vice president as well as the head of the country's nuclear program, said the further enrichment would be unnecessary if the West found a way to provide Iran with the needed fuel.
"Whenever they provide the fuel, we will halt production of 20 percent," he told state TV late Monday.
Iran has so far enriched uranium to a level of 3.5 percent, which is suitable for use in fueling nuclear power plants. The process is of concern to the West, however, because at higher levels — around 90 percent — the material can be used to make weapons.
The West fears that Iran's enrichment program is ultimately geared toward military purposes — a charge Iran denies.
On Tuesday, the spokesman of Iran's Foreign Ministry, Ramin Mehmanparast told reporters the higher enrichment will be done with the cooperation and supervision of the U.N. nuclear watchdog, adding that "if other countries or the agency could provide the fuel, our attitude can be different as well."
Mehmanparast said any plan by the West to impose new Security Council resolutions would not be helpful.
"If they attempt another resolution, they are making a mistake. It is not helpful in resolving the nuclear dispute between Iran and the West," he said. "They are completely wrong if they think our people will back down even a single step."