Some Western diplomats sharply disagreed with Russia's stance on Iran, which they said was still not cooperating with the UN watchdog agency.
One Western diplomat said the discovery of designs for gas centrifuges was not the result of Iranian cooperation but "good inspection work by the IAEA."
He said Iran only admitted it had the designs after the IAEA showed evidence it knew it had them.
The blueprints in question are based on the so-called "G2" centrifuge, developed by the British-German-Dutch consortium Urenco. But there were no indications that Urenco, which denied selling technology to Iran, provided the designs.
Pakistan is known to have both the G1 and G2. Diplomats said they would not be surprised if they came from Abdul Qadeer Khan, the father of Pakistan's atom bomb.
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