Making good on threats to pull back from its commitments under the 2015 nuclear pact with world powers, Tehran has quadrupled its production of enriched uranium, according to Iran’s Atomic Energy Organization.

The increase was announced Monday by a spokesperson for Iran’s nuclear authority, Behrouz Kamalvandi, who told Iranian media that the decision was made to “counteract offensive sanctions.”

Kamalvandi clarified that Iran would not increase its number of centrifuges, and that the uranium would for now remain at its current level of enrichment, at just over 3.5 percent.

Under the 2015 deal, Iran agreed to cap its stockpile of low enriched uranium at 300 kilograms shipping excess quantities abroad to be sold or stored. Earlier this month, however, Washington moved to block those shipments. Instead of halting its nuclear program outright, Iran has gone ahead with enrichment, even if the amount exceeds the upper limit set out in the deal.

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Though it is not clear how much fissile material Iran currently has stored, Kamalvandi said it would “reach 300 kilograms within a few weeks.” (RT)