TEHRAN (Compiled From Dispatches)-- President Mohammad Khatami said Tuesday that Tehran would do anything to clear up any misunderstanding on the bases of justice and its national interests and rights.

Speaking in a meeting with British Foreign Secretary Jack Straw, German Foreign Minister Joschka Fischer, and French Foreign Minister Dominique de Villepin, President Khatami said the region has been pushed into a highly sensitive situation and everybody should try to prevent any crisis and solve problems logically.

He said the foreign ministers’ visit demonstrates that Europe is interested in clearing up its misunderstandings with Iran in order to establish security and stability in the region.

Iran on Tuesday yielded to international demands for it to prove it is not developing nuclear weapons, promising Britain, France and Germany it would give "full cooperation" to the UN's nuclear watchdog and bow to an intrusive inspections regime.

It also agreed to suspend enrichment, another demand made by the International Atomic Energy Agency (IAEA).

Straw said in return that the European ministers held fruitful talks and reached agreements on nuclear issues, expressing hope they would soon be implemented.

Fischer, too, termed as highly constructive and good the signing of the agreement. All Countries Can Have Peaceful Nuclear Activities: Straw

Straw said that all countries can have peaceful nuclear activities.

Talking to reporters, Straw noted the meeting held here Tuesday between his Iranian, French, and German counterparts as well as Straw himself was the result of debates and correspondence between the four ministers during the past several months.

He said that the text under discussion now is related to the resolution issued by the International Atomic Energy Agency Board of Governors on September 12.

"We are all signatories to the nuclear Non-Proliferation Treaty (NPT) and are committed to it,” Straw said.

Straw stressed that the three European countries respect all countries' sovereignty rights and believe that various countries can have peaceful nuclear activities. Iran Reserves Right to Resume Uranium Enrichment: Official

Hassan Rowhani, the secretary of the Supreme National Security Council, said Iran reserves the right to resume uranium enrichment if it deems it necessary, just hours after the Islamic Republic agreed to halt enrichment activities as part of a deal aimed at calming fears over its nuclear program.

"We will suspend our activities for as long as we deem necessary, and we will resume our activities if we judge it necessary," Rowhani said.

"This could be for one day, one year, or longer. The decision is ours," he told reporters.

The foreign ministers of the three countries immediately hailed the capping of their unprecedented diplomatic effort here as an important step forward in defusing mounting tensions that have raised fears of yet another Middle East conflict.

"This is a very important day," France's Dominique de Villepin said after the ministers emerged from several hours of hard bargaining with top Iranian officials.

"We were facing a major issue. Proliferation is a major challenge to the world, and today we found a solution to the pending issues," he said.

For his part, Germany's Joschka Fischer said the deal would help "stabilize the region". Britain's Jack Straw, making his fifth visit to Tehran in two years, said the deal was "an important step forward".

According to a joint declaration, Iran pledged to show "full transparency" to the IAEA, reiterated its commitment to the nuclear Non-Proliferation Treaty (NPT), and vowed atomic weapons had "no place" in its defense doctrine.

"The Iranian government has decided to engage in full cooperation with the IAEA... and clarify and correct any possible failures," the declaration said.

It also said the "Iranian government has decided to sign the additional protocol" to the NPT.

In return, Britain, France and Germany "recognize the right of Iran to the peaceful use of nuclear energy". They pledged that the additional protocol "is in no way intended to undermine the sovereignty, national dignity or national security" of Iran.

If Iran fully implements its pledges, the Islamic Republic "could expect easier access to modern technology and supplies in a range of areas", the European trio pledged.

The flying visit of the three ministers was a climax to months of intense and secretive diplomacy by the three countries.

Last month, the IAEA gave Iran until October 31 to turn over a raft of information on its nuclear program after alarm bells went off following the discovery by its inspectors of traces of highly enriched uranium at two sites. Path Open for Stronger Relations With Iran: EU

EU foreign and security policy chief Javier Solana on Tuesday voiced his happiness in a first reaction to the news from Tehran that the Islamic Republic had decided to sign the additional protocol to the NPT.

"We are extremely pleased. It is very good news we are receiving from Tehran," Solana's spokeswoman, Cristina Gallach, told IRNA.

"It is a very important step from Iran. It will pave the way for two things, defusing the EU-Iran crisis, which was looming on the horizon, and secondly it opens the way for stronger relations with Iran in all areas," she added.

European Commission spokesman for external relations Diegos de Ojeda said, "We are looking at the news with a positive impression.

"This seems to be a very good step toward the fulfillment of our objectives as the key to the development of our relations with Iran," he told IRNA.

"If and when the news is confirmed, it will very much have a positive impact across the board on ties with Iran," said de Ojeda. He added, "We are looking forward to hearing from the IAEA that Iran is fully cooperating with it."