US President Donald Trump has tightened the screws further on Iran with sanctions on its mining industry after a frustrated Tehran said it would suspend some promises it made under a nuclear deal rejected by Washington.

On the anniversary of Trump’s withdrawal from the accord he denounced as “horrible,” tensions were soaring after the United States deployed an aircraft carrier strike group and nuclear-capable bombers to the region and accused Iran of “imminent” attacks.

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In an announcement previewed for days, Iran said it would immediately stop implementing some restrictions under the 2015 deal — a move aimed largely at pressing Washington’s European allies to step up to preserve the agreement.

Tehran said it would abandon even more if the remaining parties to the agreement — Britain, China, France, Germany and Russia — failed to start delivering on their commitments to sanctions relief within 60 days.

President Hassan Rouhani said the ultimatum was intended to rescue the nuclear deal from Trump, whose sanctions have caused severe pain in Iran — which had anticipated an economic boon from the agreement negotiated under then president Barack Obama.

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