Iran's ambassador to the IAEA Aliasghar Soltaniyeh pulls some papers out of his briefcase at the beginning of a board of governors meeting in Vienna's UN headquarters, June 12, 2006. -Xinhua

An Iranian government spokesman said on Monday that Iran would not negotiate on its nuclear fuel work as Tehran is studying a six-nation proposal aimed to solve the standoff over Iran's nuclear issue.

"Iran has obtained the nuclear fuel cycle technology, which is our obvious right and we will not negotiate over our obvious nuclear right," Iranian government spokesman Gholamhosse in Elham told reporters.

"Generally speaking, a legal and internationally-recognized obvious right is not something which we can negotiate over, but we can talk about common international concerns," Elham added.

"We are studying the (six-nation) offer seriously and fully and then we will give our response," he said.

Last week, Iran formally received the EU-drafted proposal, which was agreed by the five permanent members of the UN Security Council plus Germany.

The proposal over Iran's disputed nuclear issue includes both incentives aimed at persuading Iran to suspend uranium enrichment and possible sanctions if Iran chooses not to comply.

Shortly after Iran was given the offer, Iranian top nuclear negotiator Ali Larijani expressed cautious optimism, saying "There were positive steps but also ambiguities" in the proposal.

Iran has reiterated that it is ready for unconditional talks, but insisting that it will not negotiate on its right to peaceful nuclear technology.