Updated at 8:01 am on 1 February 2013
Iran has announced plans to install advanced uranium enrichment machines in what would be a technological leap allowing it to significantly speed production of material that the West fears could be put to developing nuclear weapons.
An International Atomic Energy Agency said on Thursday that Tehran has advised it will introduce new centrifuges to its main enrichment plant near Natanz.
The move will increase concerns in the West and Israel about Iran's nuclear ambitions, which Tehran says are entirely peaceful.
The IAEA said Iran informed it in a letter dated 23 January that "centrifuge machines type IR2m will be used in Unit A-22" at the Fuel Enrichment Plant (FEP) at Natanz.
In a reply dated 29 January, the International Atomic Energy Agency asked for more information on the announcement.
Copyright © 2013, Radio New Zealand
Audio is categorised based on the frequency of the programme it was heard in. Click on the headings below to access the programmes. For the most recently published audio, go to the latest audio page.
Streams are in Windows Media format. Mac and Linux users may need to install additional software. Get help with audio
A selection of music interviews, reviews, videos, concerts, sessions, and performances.
Downloads and podcasts are available for selected programmes. Our podcast page has a complete list of feeds.
Help on using online audio: formats, software, podcasts, downloading, and troubleshooting.