Iran continues carrying out industrial uranium enrichment, said an investigation report circulated by IAEA Director General Mohammed ElBaradei to the agency's Board of Governors in Vienna yesterday evening.

The investigation report on Iran's nuclear issues said that the nuclear center at Iran's Natanz has already established 6,000 centrifuges for enriching uranium, in which 3,800 are in operation.

According to estimates, Iran has obtained two tons of enriched uranium since its uranium enrichment activities restarted at the Natanz nuclear center two years ago.

The United Nations Security Council has made four resolutions in two years requesting Iran to halt its questionable uranium enrichment activities and imposed sanctions on Iran as it refused to cooperate, but Iran has never stopped its industrial uranium enrichment.

ElBaradei also admitted in the report that over the recent three months, IAEA inspectors cannot verify whether Iran has a secret plan for nuclear weapon development, as the connection between IAEA and Iran has actually been cut off. Iran refused to provide any support for IAEA's investigation on the nature of Iran's nuclear plans.

The United States and other western countries keep accusing Iran of secretly developing nuclear weapons, but Iran insists that its nuclear plans are only for peaceful purpose.