UN nuclear chief Mohamed ElBaradei yesterday termed his talks with Iran's chief nuclear negotiator Ali Larijani as "constructive", the official IRNA news agency reported.

"I can tell you on the issue of cooperation to resolve outstanding issues, Mr Larijani renewed his commitment that the Islamic Republic of Iran will accelerate its efforts to work with us in next couple of weeks to provide clarity to the issue that we need to clarify," he said.

"On the other issue of confidence-building measures, including suspension of enrichment, we had a good discussion. We exchanged views on different processes and modalities for Iran to come to terms with the request of the international community and to work with the international community," he said.

"To build confidence we agreed that we will continue an intensive dialogue in the next few weeks with the aim of being able to move forward on this difficult and important issue."

ElBaradei, Director General of the International Atomic Energy Agency (IAEA), arrived in Tehran early Thursday morning in a last-ditch bid to convince Iran to comply with the April 28 deadline set by the UN Security Council for Iran to suspend uranium enrichment.

Upon his arrival, ElBaradei stressed the importance to solve the Iranian nuclear issue through political means and negotiations, urging the Islamic Republic to halt all activities related to uranium enrichment according to a non-binding presidential statement of the UN Security Council.

His 24-hour visit came just two days after Iran announced that it had successfully enriched uranium to fuel nuclear power reactors.

However, Iran's chief nuclear negotiator Ali Larijani said on Thursday that Iran would not resume suspension of uranium enrichment activities.

Larijani told reporters after talks with ElBaradei that a UN Security Council demand that Iran freeze the enrichment-related activities was "not so important."

"Every action must be reasonable and logical. We are cooperating in a constructive manner with the (International Atomic Energy) Agency, Mr ElBaradei is here and the inspectors and cameras are here, so such a proposal is not very important to solve the problem," he said.

Iran has insisted on its right to peaceful nuclear technology enshrined in the Non-Proliferation Treaty.

It has also vowed never to give up its nuclear program which it says is for fully peaceful purposes but the West fears could lead to an atom bomb.