Iran's vice president says technical roadblocks hampering a final nuclear accord with world powers have been eliminated during ongoing discussions with American negotiators.

Ali Akbar Salehi, who is also in charge of Iran's nuclear agency, told state television on Saturday that Tehran offered proposals to remove "fake concerns" over the country's nuclear program, paving the way for a final deal.

But the hardline daily paper Kayhan slammed the negotiations, saying that an American proposal of a 10-year suspension of Iran's uranium enrichment activities is a first step aimed at finally toppling Iran's ruling Islamic government.

Iran and the six-nation group — the U.S., Russia, China, Britain, France and Germany — hope to reach a rough deal on Iran's disputed nuclear program by March and a final agreement by June 30.