Donald Trump has announced new sanctions against Iran following Tehran threatened to enrich its stockpile of uranium.
The US president has issued an executive order imposing new restrictions on Iranian steel, aluminium, copper and iron.
These sectors present Iran’s troubled economy with foreign currency earnings.
Mr Trump mentioned Tehran could anticipate “additional actions unless it fundamentally alters its conduct”.
He mentioned in a statement: “Today’s action targets Iran’s income from the export of industrial metals – 10% of its export economy – and puts other nations on notice that permitting Iranian steel and other metals into your ports will no longer be tolerated.”
Iran threatened to enrich its stockpile of uranium closer to weapons-grade levels in 60 days if planet powers failed to negotiate new terms on the 2015 nuclear deal.
President Rouhani’s words come precisely a year following Donald Trump withdrew America from the Obama-era agreement and reimposed sanctions, even though other nations stayed in.
Mr Rouhani issued the ultimatum to the remaining signatories of the deal – Britain, China, the European Union, France and Germany.
State tv mentioned letters outlining the partial withdrawal from the deal had been sent to the countries’ ambassadors, and also to Russia.
Mr Rouhani mentioned Iran would quit exporting excess uranium and heavy water from its nuclear programme, two specifications of the deal.
He did not give information on the extent to which Iran was ready to enrich uranium.
“This surgery is to save the [deal], not destroy it,” Mr Rouhani mentioned.
“If the 5 nations join negotiations and aid Iran to attain its added benefits in the field of oil and banking, Iran will return to its commitments according to the nuclear deal.”
Earlier, Foreign Secretary Jeremy Hunt mentioned there would be “consequences” for Iran if it broke its commitments below the 2015 deal.
Mr Hunt, speaking alongside US Secretary of State Mike Pompeo, described Iran’s threat to boost uranium enrichment as an “unwelcome step”.
He urged Iran “not to take additional escalatory measures and to stand by its commitments”.
Mr Pompeo mentioned he was confident America and its allies would make sure Iran had “no pathway for a nuclear weapons method”.