TEHRAN - Iran is shifting its higher grade uranium enrichment work from a site it has used for years to one that was only disclosed in 2009 and aims to triple the production capacity of the nuclear fuel, state broadcaster IRIB reported on Wednesday.

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"This year, under the supervision of the (International Atomic Energy) Agency, we will transfer 20 percent enrichment from the Natanz site to the Fordow site and we will increase the production capacity by three times," the head of Iran's atomic energy agency, Fereydoun Abbasi-Davani, told reporters after a cabinet meeting, IRIB reported.