A delegation from the UN nuclear watchdog arrived in Iran on Wednesday to see if the Tehran government is willing to answer all outstanding questions about its disputed nuclear program, Iranian state television reported.

The report said a high-ranking five-member delegation from the International Atomic Energy Agency, (IAEA), headed by Deputy Director General Olli Heinonen arrived in Tehran for a two-day visit.

Heinonen would meet Iran's top nuclear negotiator, Ali Larijani, on Wednesday, the report said.

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The delegation would not inspect Iran's nuclear facilities, and conclusion of the talks would be announced on Thursday, according to the TV report.

The visit comes after Larijani and IAEA Chief Mohammad ElBaradei met last month in Vienna, Austria. It also comes two days after ElBaradei said Iran had scaled back its uranium enrichment program, suggesting a new willingness from the government to resolve the international standoff over its nuclear defiance.

Members of the UN Security Council are preparing to debate a third set of sanctions against the Islamic republic in response to Tehran's refusal to suspend uranium enrichment, which can produce fuel for civilian energy or fissile material for a bomb.

Speaking in Vienna, ElBaradei said Monday if Iran finally honored its promise to resolve questions surrounding its program and froze all enrichment activities, this would influence the actions of the six nations - the five permanent council members and Germany, ElBaradei said, suggesting that the council would hold off on new sanctions.

Tehran insists it wants to develop an enrichment program to generate energy, but the U.S. and some of its allies fear that it could misuse it to produce the fissile core of nuclear warheads.

Iran has said it is ready to remove the ambiguities related to its nuclear activities through negotiations but rejects enrichment suspension, a condition set by the West for resumption of talks on the case.

The Security Council first imposed sanctions on Iran in December and modestly increased them in March over Iran's refusal to suspend enrichment.