Iranian President Mahmoud Ahmadinejad said Wednesday that President Barack Obama's new nuclear strategy showed his inexperience.

"We consider such remarks by Obama as an indication of his lack of experience and fledgling status," Ahmadinejad said in a speech, according to the semi-official Fars News Agency.

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Ahmadinejad further warned Obama not to pursue George Bush's strategies, otherwise "the response of the nations will be the same tooth-breaking response that they showed to Bush".

Reminding Obama's motto of change and his remarks at the UN General Assembly where he acknowledged mistakes of the former US administration, Ahmadinejad said that Obama's yesterday remarks proved to the opposite "as he (Obama) threatened to use nuclear and chemical weapons against those nations that do not obey the US and do not give in to the US force and stand against its aggressions and expansionism".

...President Ahmadinejad said that the American leaders still act like cowboys and like heroes in Western movies, "Whenever there is a problem, they take out their guns."

In the interview with the New York Times on Monday, Obama urged a sanctions resolution against Iran "that has bite" -- not the term "crippling sanctions" used by many lawmakers lately, as well by Secretary of State Hillary Rodham Clinton in the past -- and wouldn't answer whether a "nuclear capable" Iran was as dangerous as a nuclear-armed one.