(FILES) In this file photo taken on April 06, 2015, an employee works at the Iran Alloy Steel Company's plant in the central Iranian city of Yazd. - US President Donald Trump on May 8, 2019, announced sanctions against Iran's steel and mining sectors, hours after Tehran said it would suspend some curbs under a denuclearization deal rejected by Washington. The White House said it was targeting the country's biggest revenue source after oil and warned in a statement: "Tehran can expect further actions unless it fundamentally alters its conduct." (Photo by Atta KENARE / AFP)ATTA KENARE/AFP/Getty Images
An employee at the Iran Alloy Steel Company plant in the central Iranian city of Yazd. Iran's steel sector was among those subject to new sanctions announced by Donald Trump on Wednesday © AFP

The US has said it would it impose sanctions on Iran’s iron, steel, aluminium and copper sectors, which the White House said were Tehran’s “largest non-petroleum-related source of export revenue”.

In a statement announcing the sanctions on Wednesday, US President Donald Trump said Tehran should expect further actions from the US “unless it fundamentally alters its conduct”.

“Since our exit from the Iran deal, which is broken beyond repair, the United States has put forward 12 conditions that offer the basis of a comprehensive agreement with Iran.”

The move comes hours after Iran’s leaders said they would cease to implement some of its commitments under the 2015 nuclear accord, putting the deal at risk of collapse. Mr Trump withdrew the US from the deal last year.

Mike Singh, a senior fellow at the Washington Institute in Washington, said the move represented a “continuation of the ‘maximum pressure’ campaign”.

“It targets a remaining source of export revenue for Iran, and a source of employment for Iranians, so this may add significantly to the economic pressure on Iran”, said Mr Singh.

Jim Risch, the Republican chairman of the Senate foreign relations committee, said the move by Iran was a “clear signal that maximum pressure is achieving our desired effects”.

“However, as with any international agreement, the regime’s comments on partial compliance are a non-starter — either you’re in or you’re out”.

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