Iran met an International Atomic Energy Agency major demand and handed over to the UN nuclear agency the blueprints showing how to mold uranium into the shape of a nuclear warhead, diplomats said Tuesday. The concession made by Teheran was most likely meant to ward off the threat of a new wave of sanctions announced by the U.N.

The documents were previously spotted by U.N. officials and they had asked Teheran to hand them over since 2005.

The IAEA inspectors accidentally spotted the blueprints in 2005 while they were examining some nuclear facilities in Iran that were suspected to have military dimensions. They were allowed then by Iranian officials to look at them, but not to make copies.

The blueprints will be included in a report that will be given by agency head Mohammed El Baradei. The report regards Iran's intentions for its uranium enrichment program.

However, the U.N. diplomats said that Iran hasn’t met the other demands made by the IAEA. Agency chief Mohamed ElBaradei will present his latest report regarding the subject to the agency's 35-nation board of governors. The report is scheduled to begin on Nov. 22, Thanksgiving Day.

"(But while) we may well see some clear cooperation from Iran but it's unclear whether it will be enough to actually move forward in the 'work plan'," one diplomat said.

Iran is now facing the responsibility of answering questions that will most likely be addressed to them regarding the blueprints.

This move follows the announcement made by President Mahmoud Ahmadinejad that Iran has reached a new milestone in its bid to obtain a nuclear based energy industry.

The middle-eastern country has reached the target of operating 3,000 centrifuges for enriching uranium. The announcement was made as Ahmadinejad attended a public rally in the eastern Iranian city of Birjand a week ago.

According to estimations made by the western experts, 3,000 centrifuges operating at full capacity could make enough enriched uranium to build an atomic bomb in a period of about a year.