Iran Warns of NPT Withdrawal, Strait of Hormuz Closure After US Attack

Following the United States’ airstrikes on Iranian nuclear facilities, senior Iranian lawmakers have raised the possibility of withdrawing from the Nuclear Non-Proliferation Treaty (NPT) and closing the strategic Strait of Hormuz in retaliation.

The warnings come after US President Donald Trump announced, in a post in Truth Social, on Sunday at dawn, that the United States carried out what he described as a “very successful attack” on three Iranian nuclear facilities: Fordow, Natanz, and Isfahan.

Esmail Kowsari, a prominent member of Iran’s National Security and Foreign Policy Committee in Parliament, affirmed that the country had already implemented protective measures to safeguard its nuclear infrastructure. He dismissed allegations of severe damage to Iran’s nuclear program, calling them “baseless claims,” and insisted that “Tehran has accurate intelligence disproving such assertions.”

Kowsari revealed that authorities are actively weighing a possible exit from the NPT. “We are reviewing the option of withdrawing from the Nuclear Non-Proliferation Treaty,” he said, noting that the parliamentary committee would soon hold an emergency session to assess the American attack and formulate Iran’s official response.

Reiterating Iran’s commitment to Resistance, Kowsari warned that “our armed forces will certainly continue striking the Zionist entity,” adding, “US military bases across the region will not remain secure. Hitting them will be far easier than targeting the Israeli regime.”

He further cautioned that Iran is prepared to escalate militarily if necessary, stating, “The closure of the Strait of Hormuz is on the table. We will definitely implement it if the situation requires.”

‘Iran will respond decisively’
In a related comment, Sara Fallahi, another member of the parliamentary committee, told Tasnim News that a forceful response is inevitable. “Iran will respond decisively,” she said, adding that retaliation could involve “a full withdrawal from the NPT and closure of the Strait of Hormuz.”

Parliament’s Foreign Policy Committee head, Abbas Golroo, reinforced that position in a statement posted on X, asserting that “Iran has the legal right to withdraw from the nuclear Non-Proliferation Treaty (NPT) based on its Article 10, following US strikes on three Iranian nuclear facilities.”

After the U.S. strikes three nuclear facilities (Fordo,Natanz, Isfahan), and according to Article X of NPT, the I.R.of IRAN has the legal right to withdraw from the treaty pic.twitter.com/UOQclDSBf6

— عباس گلرو (@GolrooAbbas) June 22, 2025

Article 10 of the NPT provides that any member state has “the right to withdraw from the Treaty if it decides that extraordinary events have jeopardized the supreme interests of its country.”

US Strikes 3 Nuclear Sites in Iran

IAEA announces emergency meeting following US strikes
In response to the escalating crisis, International Atomic Energy Agency (IAEA) Director General Rafael Grossi announced an emergency session of the agency’s Board of Governors scheduled for Monday in Vienna.

“In light of the urgent situation in Iran, I am convening an emergency meeting of the @IAEAorg Board of Governors for tomorrow,” Grossi posted on X on Sunday.

In light of the urgent situation in Iran, I am convening an emergency meeting of the @IAEAorg Board of Governors for tomorrow.

— Rafael Mariano Grossi (@rafaelmgrossi) June 22, 2025

Separately, the head of Iran’s Atomic Energy Organization sent a formal letter to the IAEA, demanding an independent investigation into the US aggression. Iranian officials have insisted that the targeted facilities were operating under full IAEA supervision and posed no nuclear threat.