"My colleagues are constantly and precisely monitoring the United States' declared stances (on Iran) and its performance but no change has been detected in the US hostile policies towards the Iranian nation," Salehi said on Tuesday.
"US officials and administrations have usually acted against their declared stances," he said, adding that Washington has always adopted double-standard approaches towards Iran.
He called for practical change in the US stance on Iran, and stated, "Our experience has taught us that what different US officials say cannot be trusted, but we believe that the US policy should be judged based on the practical moves of the US administration."
Salehi pointed to the recent remarks by US Secretary of State Hillary Clinton who had called for immediate talks between Tehran and Washington, and said, "Even if they prove to be honest in their recent claim - although it is suspected - their offer does not match their actions."
Iranian officials say conditions are not ripe for direct talks between Iran and the US, reiterating that Washington should drop its hostile policy against Iran first.
The United States and Iran broke diplomatic relations in April 1980, after Iranian students seized the United States' espionage center at its embassy in Tehran. The two countries have had tense relations ever since, but have shown willingness to attend talks to help resolve regional issues, including security in Iraq. Yet, the two countries have avoided talks on bilateral issues for the last thirty years.
Earlier this month, Washington reiterated its demand for immediate talks with Tehran, with Clinton saying that the United States is open to bilateral talks about Iran's nuclear program if Tehran is ready.
Responding to a question in a forum attended by a group of officials, experts and diplomats from the United States and the Middle East in Washington at the time, Clinton called Iran the hardest issue she has dealt with as secretary of state, and stressed that the Obama administration is prepared for bilateral talks with Iran.
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Iranian Foreign Minister Ali Akbar Salehi said Tehran cannot trust the US officials' remarks on Washington's willingness to hold bilateral talks with Iran as Iran sees no practical change in the United States' US hostile policies.
News ID 183688