Iranian state television says Iran has developed a new generation of centrifuges to enrich uranium.

The report said the centrifuges have higher speed and will be unveiled later Wednesday.

The West believes Iran is developing a nuclear weapons capability, and has imposed sanctions on Tehran to pressure it to stop enriching uranium. Iran says its nuclear ambitions are peaceful.

A team from the United Nations nuclear agency is scheduled to make a two-day visit to Iran beginning Monday. The International Atomic Energy Agency's chief inspector said experts had “intensive discussions” with Iran about its nuclear aims during a trip in late January, and that both sides had “a lot of work to do.”

The IAEA issued a report in November citing evidence of Iranian efforts to design a nuclear weapon in violation of international sanctions and agreements. Iran says the report was based on fabrications.