"Twenty percent uranium and nuclear plates are being produced inside the country and there has never been a halt in the production trend," Salehi was quoted as saying.
"Nuclear plates for Tehran reactor are produced inside the country, and the needed fuel assembly is allocated for the reactor each month," said Salehi.
Earlier this month, conservative MP Hossein Naqavi Hosseini, spokesman for the foreign affairs committee, said Iran was temporarily halting enrichment to the 20 per cent level.
The enrichment programme is at the core of Iran's dispute with world powers, who suspect it masks a drive for atomic weapons despite repeated denials by the Islamic republic.
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Tehran insists that 20 per cent enrichment is only used for the production of the fuel needed for the research and medical reactor of Tehran.
Enriching uranium to 20 per cent purity is a few technical steps short of producing weapons-grade fissile material.
Iran insists it will not bow to pressure to end enrichment despite repeated demands by the UN Security Council and several rounds of sanctions.
Iran is seeking the lifting of the sanctions, which have damaged its struggling economy, while world powers are seeking to ensure that Tehran is not able to develop nuclear weapons.