Iran produced 35 kilograms of 20-percent enriched uranium, Head of the Atomic Energy Organization of Iran Ali Akbar Salehi said at the opening ceremony of the first courses on nuclear cardiology, the Fars news agency reported.
Salehi added Iran is able to produce an average of 3 kg of highly enriched uranium in a month.
"If necessary, we can produce up to 5 kg of highly enriched uranium in a week, but there is no need yet," he said.
Late last week, Salehi said the country produced 30 kg of 20-percent enriched uranium. In late August, the figure was 25 kg.
The enriched uranium can be used to produce nuclear weapons. However, it is also necessary as a fuel for nuclear power plants.
The United States and other Western countries accuse Iran of developing nuclear weapons for military purposes under the guise of a peaceful nuclear energy program. Tehran denies the charges, claiming that its nuclear program is aimed solely at meeting its electricity needs.
The U.N. Security Council adopted six resolutions in connection with the suspension of Iran's nuclear program. Four involve the use of economic sanctions against Iran.
The U.N. Security Council adopted the last resolution against Iran on June 9. The resolution provides for making new sanctions against Tehran in connection with its refusal to cease uranium enrichment. This is the fourth resolution adopted by the council due to Tehran's unwillingness to comply with international requirements regarding its nuclear program.