This article is from the source 'bbc' and was first published or seen on . It will not be checked again for changes.

You can find the current article at its original source at http://news.bbc.co.uk/go/rss/-/1/hi/world/middle_east/8505426.stm

The article has changed 10 times. There is an RSS feed of changes available.

Version 1 Version 2
Iran 'ups nuclear fuel enriching' Iran 'ups nuclear fuel enriching'
(40 minutes later)
Iran has started the process of enriching uranium to 20% in defiance of the West, Iranian state media says.Iran has started the process of enriching uranium to 20% in defiance of the West, Iranian state media says.
The process was begun at the Natanz plant in the presence of International Atomic Energy Agency (IAEA) inspectors, al-Alam state television reported.The process was begun at the Natanz plant in the presence of International Atomic Energy Agency (IAEA) inspectors, al-Alam state television reported.
The move came after Western powers stepped up pressure for international sanctions against Iran.The move came after Western powers stepped up pressure for international sanctions against Iran.
The US and its Western allies say Iran is trying to develop a nuclear weapon - a charge Iran denies.The US and its Western allies say Iran is trying to develop a nuclear weapon - a charge Iran denies.
The BBC's John Leyne says Tuesday's announcement is designed to stress Iran's view that it is only acting within its rights.The BBC's John Leyne says Tuesday's announcement is designed to stress Iran's view that it is only acting within its rights.
Experts are still divided over whether Iran has taken the decision to actually build a bomb, he says.Experts are still divided over whether Iran has taken the decision to actually build a bomb, he says.
Iran currently enriches uranium to a level of 3.5% but requires 20% enriched uranium for its Tehran research reactor, which is meant to produce medical isotopes. A bomb would require uranium enriched to at least 90%.Iran currently enriches uranium to a level of 3.5% but requires 20% enriched uranium for its Tehran research reactor, which is meant to produce medical isotopes. A bomb would require uranium enriched to at least 90%.
URANIUM ENRICHMENT Iran says it is increasing uranium enrichment from 3.5% needed for commercial nuclear reactorsSays it will enrich to 20%, needed for a research reactor near TehranWeapons-grade uranium is at least 90% enrichedExperts say achieving 20% is a key step towards weapons grade In depth: Nuclear fuel cycle Iran confuses West again Send us your comments
Enriching to 20% would take about one year, using the 2,000 centrifuges at the underground Natanz facility, experts say.Enriching to 20% would take about one year, using the 2,000 centrifuges at the underground Natanz facility, experts say.
But moving from 20% to 90% would take only six months and only require between 500 and 1,000 centrifuges.But moving from 20% to 90% would take only six months and only require between 500 and 1,000 centrifuges.
Iran insists its nuclear programme is entirely peaceful and designed to provide civilian power.Iran insists its nuclear programme is entirely peaceful and designed to provide civilian power.
It had announced on Sunday that it aimed to produce uranium enriched to 20%. It had already announced on Sunday that it aimed to start producing uranium enriched to 20%.
On Monday, the US and France said the time had come "for the adoption of strong sanctions". Iran's top nuclear official, Ali Akbar Salehi, also said the government would build 10 new enrichment plants next year, despite the fact that it still had problems with its first one.
The British government described Iran's new position as deeply worrying. The US and France reacted by saying that the time had come "for the adoption of strong sanctions", while the British government described Iran's new position as deeply worrying.
The UN Security Council has already imposed three rounds of sanctions against Iran in an effort to make it cease all uranium enrichment activities and heavy-water projects, which could produce weapons-grade plutonium. The UN Security Council has already imposed three rounds of sanctions against Iran in an effort to make it cease all uranium enrichment activities and heavy-water projects, which could produce plutonium suitable for use in weapons.
In October, a deal brokered by the IAEA was thought to have been struck for Iran to send its uranium to Russia and France for enrichment.
But last month, diplomats said Iran had told the IAEA that it did not accept the terms of the deal - though there have since been other, conflicting messages.
Mr Salehi has said that enriched uranium production would be halted if Iran received fuel enriched to 20% from abroad.