Iranians are clearly on edge with many speculating on a possible United States withdrawal from the 2015 multilateral nuclear deal which was supposed to free Iran's economy from crippling sanctions, although in reality only the European Union, Russia and China removed financial restrictions.
"We are much more prepared than they think, and they will see that if they violate this accord, within a week, less than a week, they will see the result".
Rouhani was speaking as Tehran marked National Nuclear Technology Day.
However, some now believe that US President Donald Trump's hostile rhetoric, including his recent threat to scrap a landmark nuclear deal with Iran, has been effective in the deterioration of the Rial's depreciation.
The daily also stated that this is the first time the Iranian government makes a decision like this since it agreed to curb its nuclear activity in 2015 in exchange for the removal of nuclear sanctions.
USA sanctions that were lifted under the deal reached by Tehran and six world powers in July 2015 will be reinstated unless Trump waives them again on May 12.
"Iran's stance on chemical weapons is clear and we condemn any use of them against any target", Zarif added.
Iran "strongly" condemned the "flagrant" aggression against the Syrian regime's T-4 airbase in Homs, Iran's foreign ministry said in a statement.
He said "preparations have already been made" without giving more details.
The Syrian Observatory for Human Rights, which monitors the country's conflict, said 14 fighters were killed, including Syrian army officers and Iranian forces.
The head of the Atomic Energy Organization of Iran, Ali Akbar Salehi, said that domestic experts have managed to renovate Tehran Research Reactor (TRR), a 5 megawatt-thermal pool-type light water research reactor. He said, if his demands are not met within 120 days, the United States will withdraw from the deal.
Analyst Richard Nephew said whether Trump's conditions could be met depended on whether he wants a face-saving way to live with the nuclear deal with the political cover of tough-sounding USA legislation, or whether he really wants the deal rewritten.
France, Britain, and Germany are seeking to persuade their European Union partners to back new sanctions on Iran, mainly on its missile program, in hopes of persuading Trump not to pull the United States out.