Iranian Foreign Ministry spokesman Hamid Reza Asefi Sunday blamed the United States for its activities to prevent the Europe Union (EU) from offering a compromise on Iran's nuclear dispute.

"Obviously, the U.S. is trying to bring the Europe to a place where the nuclear case can not be resolved," Asefi told reporters.

Washington always imposed preconditions on the nuclear negotiation, which has reduced the possibilities to hold talks and added more difficulties for all parties to come to an agreement, denounced the spokesman.

Referring to the purported time limit for Iran to respond to the six-nation package, Asefi stressed "the Americans said they had given us a time deadline to respond, but it's not correct and not appropriate."

"We are studying the package carefully now, and we will tell Europe our opinions after we finish the research process," he added.

Meanwhile, Asefi also referred to the possible talks between Iran and the U.S. on the Iraqi issue, saying direct talks between the two sides is not on Iran's agenda now.

The EU foreign policy chief Javier Solana on June 6 presented to Iran a new package over Iran's nuclear issue, which had been agreed by the five permanent members of the United Nations Security Council plus Germany in a meeting in Vienna.

The proposal includes both incentives aimed at persuading Iran to suspend uranium enrichment and possible sanctions if Iran chooses not to comply.

Western countries have asked Iran to accept the proposals and give a formal respond to the international community before the end of June.

U.S. Secretary of State Condoleezza Rice said on Friday that she had noticed some positive statements from the Iranian top officials, but insisting "the international community needs an (official Iranian) answer to know if the negotiation track is going to bear fruit."

U.S. President George W. Bush also warned that Iran has only few weeks but not months to give a respond to the international community.