Toughter tone   

In the report, which was released last Monday, ElBaradei said Iran still has to provide explanations to support its claim that allegations about nuclear weapons-related projects are false.

The report also noted that Teheran is continuing to develop its uranium enrichment capability, ignoring the UN Security Council's demands for suspension of its nuclear program.

Iran's alleged studies regarding uranium conversion, high explosives testing and design of a missile re-entry vehicle remained a "matter of serious concern", said the report.

It was "essential" that Iran provide the UN nuclear watchdog with more information without delay, the report added.

Diplomats in Vienna said the tone of the IAEA report was unusually tough and reflected deep frustration at Iran's lack of cooperation.

Iran's possession of nuclear warhead diagrams was "alarming", IAEA Deputy Director General Olli Heinonen told board members three days after the report's release.

"No deviation": Iranian spokesman

Despite the tough wording, Iran said Sunday that the latest report proved there is "no deviation" in Iran's nuclear program from civilian purpose.

Mohammad-Ali Hosseini, a spokesman for the Iranian Foreign Ministry, said the report indicated that all Iranian sites have been under the IAEA's full supervision.

"The report also said that all the agency's findings are in full conformity with Iran's nuclear activities" at the enrichment facilities in Natanz, central Iran, he said.

"The IAEA report has also reiterated that all activities at Arak installations are under direct supervision of the agency," Hosseini said, "All Iran's fuel consignments received for Bushehr nuclear power plant have been supervised by the agency."