Iran's chief nuclear negotiator Saeed Jalili denied on December 21 Tehran's link to weapons seized in Thailand this month from an impounded plane travelling from North Korea.
Last week, a high-ranking Thai government security official on a team investigating the arms seized in Bangkok said those weapons were likely destined for Iran.
"The question that we are after such things is completely baseless and we are not at all after such weapons, let alone bringing in or importing from other countries," Saeed Jalili told a news conference in Tokyo.
"If you look at past history, and if you compare our previous dialogues, you will see they our approach toward this issue is completely different from that of North Korea," top nuclear negotiator added.
Jalili stressed that Iran, unlike North Korea, is a member of the Non-Proliferation Treaty (NPT), a global treaty to stop the spread of nuclear weapons, and the International Atomic Energy Agency (IAEA).
Jalili noted that all the countries have a right to use nuclear energy, but nuclear weapons should be banned, adding that his country is ready to help all the states to achieve a non-nuclear world.
Reminding the atom bombs dropped on Hiroshima and Nagasaki during the WW2, Jalili said that such revenges should never be repeated.
Meanwhile, US Admiral Mike Mullen said in his annual evaluation on threats against the United States that affects of a military intervention against Iran will be limited and that using political methods is still the only way to reach the regional peace.
In October, six powers including the US offered a deal under which Iran would send most of its low-enriched uranium abroad for conversion into fuel for a nuclear medicine reactor in Tehran.
However, Tehran has backed away from it, raising the prospect of additional sanctions. The United States has set a year-end deadline for Iran to accept the UN-drafted deal.