San Francisco Chronicle

Tehran blames sabotage for nuclear site blackout

- By Ronen Bergman, Rick Gladstone and Farnaz Fassihi Ronen Bergman, Rick Gladstone and Farnaz Fassihi are New York Times writers.

A power failure that appeared to have been caused by a deliberate­ly planned explosion struck Iran’s Natanz uranium enrichment site Sunday, in what Iranian officials called an act of sabotage that they suggested had been carried out by Israel.

The blackout injected new uncertaint­y into diplomatic efforts that began last week to salvage the 2015 nuclear deal repudiated by the Trump administra­tion.

Iran did not say precisely what had caused the blackout at the heavily fortified site, which has been a target of previous sabotage, and Israel declined to confirm or deny any responsibi­lity. But U.S. and Israeli intelligen­ce officials said there had been an Israeli role.

Two intelligen­ce officials briefed on the damage said it had been caused by a large explosion that destroyed the independen­t — and heavily protected — internal power system that supplies the undergroun­d centrifuge­s that enrich uranium.

The officials, who spoke on the condition of anonymity, said the explosion had dealt a severe blow to Iran’s ability to enrich uranium and that it could take at least nine months to restore Natanz’s production.

If so, Iran’s leverage in new talks sought by the Biden administra­tion to restore the nuclear agreement could be significan­tly compromise­d. Iran has said it will take increas

ingly strong actions prohibited under the agreement until the sanctions imposed by former President Donald Trump have been rescinded.

It was not immediatel­y clear how much advance word — if any — the Biden administra­tion received about the Natanz operation, which happened on the same morning that the U.S. Defense Secretary Lloyd Austin was visiting Israel. But Israeli officials have made no secret of their unhappines­s over President Biden’s desire to revive the nuclear agreement that his predecesso­r renounced in 2018.

Ali Akbar Salehi, head of Iran’s Atomic Energy Organizati­on, described the blackout as an act of “nuclear terrorism” and said the internatio­nal community must confront this threat.

Israel, which considers Iran a dire adversary, has sabotaged Iran’s nuclear work before with tactics ranging from cyber attacks to outright assassinat­ions.

The explosion at Natanz struck barely a week

after the United States and Iran, in their first significan­t diplomacy under the Biden administra­tion, participat­ed in new talks in Vienna aimed at reviving the nuclear agreement abandoned by Trump.

Power was cut across the Natanz facility, Behrouz Kamalvandi, a civilian nuclear program spokespers­on, told Iranian state television. He said there had been no casualties or damage.

Malek Shariati Niasar, an Iranian lawmaker who serves as a spokespers­on for the Parliament’s energy committee, wrote on Twitter of the possibilit­y of “sabotage and infiltrati­on.”

The blackout came less than year after a mysterious fire ravaged another part of the Natanz facility, about 155 miles south of Tehran. Iranian officials initially played down the effect of the fire, but later admitted that it had caused extensive damage.

 ?? Atomic Energy Organizati­on of Iran 2019 ?? Enrichment centrifuge­s operate at Iran’s Natanz facility in 2019. The plant lost power Sunday.
Atomic Energy Organizati­on of Iran 2019 Enrichment centrifuge­s operate at Iran’s Natanz facility in 2019. The plant lost power Sunday.

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