Iran''s Foreign Ministry dismissed on Monday comments by U.S. President-elect Barack Obama about Tehran''s disputed nuclear ambitions and said it did not expect any major change in the policies of its old foe.

Obama called on Friday for an international effort to stop Iran developing a nuclear bomb, saying it was "unacceptable."

Iranian Foreign Ministry spokesman Hassan Qashqavi repeated Tehran''s official position that nuclear weapons had no place in the Islamic Republic''s defense doctrine.

"We need a change in the erroneous impressions of the United States," he told a news conference, broadcast and translated by Iran''s English-language Press TV station. "It is very clear that Iran does not ... possess nuclear weapons."

Iran says its nuclear plans are to make electricity so it can export more oil and gas. But its refusal to halt sensitive work has drawn three sets of U.N. sanctions and U.S. measures.

Washington severed diplomatic ties with Iran shortly after its 1979 Islamic revolution and is spearheading the drive to isolate Tehran over its nuclear activities.

Iranian officials have said Obama''s victory showed Americans wanted a fundamental change from the policies of President George W. Bush, who branded Iran part of an "axis of evil."

Iranian President Mahmoud Ahmadinejad last week congratulated Obama, who has said he would harden sanctions on Iran but has also held out the possibility of direct talks.