The comments, taken together, could represent simply a tough bargaining stance by the Islamic Republic ahead of the next round of negotiations in the countdown to the final deal expected by June 30. But President Hassan Rouhani's demand of an immediate and full sanctions relief is likely to complicate efforts to reach a final deal.
Iran and the six world powers agreed last week in Switzerland on a framework deal, which is meant to curb Iran's bomb-capable technology while giving Tehran quick access to bank accounts, oil markets and financial assets blocked by international sanctions.
But the framework deal does not include the immediate lifting of punitive sanctions imposed on Iran. Instead, it says the sanctions will be suspended once international monitors verify that Tehran is abiding by the limitations spelled out in the agreement.
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The framework agreement has received endorsement by much of the Iranian establishment, though hard-liners have overwhelmingly opposed it and described the deal as a "defeat" for Iran.
Supreme Leader Ayatollah Ali Khamenei said in remarks published on his official website Thursday that he "is neither for nor against" the deal.
Khamenei, who has final say on all state matters, added that there "is no binding" agreement yet. He also said that the punitive "sanctions should be lifted completely, on the very day of deal" something that has not been agreed on in Switzerland.
A lot remains to be done until the deal is finalized, Khamenei said, adding it may take more than three months. "The problems are in the details and (negotiators) should sit down and discuss them one by one," he said.