WASHINGTON, June 25 (Xinhua) -- The United States does not expect a breakthrough in talks over Iran's nuclear issue, State Department deputy spokesman Tom Casey said on Monday.

    "I don't think Iran's track record is particularly noteworthy or particularly likely to give me or anyone else confidence that anything will come of these of the discussions," Casey said at a briefing.

    "We certainly like to see them (Iranians) comply but to date they haven't," the spokesman said of the demands by the International Atomic Energy Agency (IAEA) for comprehensive inspections in Iran.

    Casey made the remarks after European Union foreign policy chief Javier Solana had talks with Iran's nuclear negotiator Ali Larijani in Lisbon, Portugal, on Saturday.

    The latest round of nuclear talks with Iran were "constructive" and will be resumed in three weeks, Solana said.

    Mohamed El Baradei, IAEA director general, said Friday that the Iranian government would cooperate with the IAEA to draw up a plan of action on how to resolve Iran's disputed nuclear issue.

    The UN Security Council members -- the United States, Britain, Russia, France, Germany and China -- are discussing another set of sanctions against Iran's nuclear ambitions.

    The council has imposed two sets of sanctions against Iran for its refusal to freeze both its uranium enrichment and construction of a heavy-water reactor for producing plutonium.

    Iran insists that it wants to generate electricity by developing nuclear power so that it can save more oil for exportation. Iran is OPEC's second largest oil exporter.