It appears Iran will turn down a nuclear agreement brokered this week by the United Nations.

The country delayed until next week a formal response to the deal deal would transfer most of Iran's low grade enriched Uranium to Russia.

The U.N.-backed plan was presented Wednesday to ease western fears that Iran will build a nuclear bomb.

Alireza Nader of the RAND Corp. said if Iran rejects the deal, it would "lead to increased tensions" and possibly more sanctions. He isn't confident, however, that the country will cooperate.

"Accepting it would indicate a compromise with world powers, and Tehran has repeatedly said it would not compromise," Nader said.

The U.S., Russia and France agreed to the plan, but Iran's state-run TV said Tehran wants to buy nuclear fuel from another party, rather than ship its uranium to Russia.

Iran said it is "considering the [U.N.] proposal in depth and in a favorable light, but needs time until the middle of next week to provide a response."