Iran’s acting defense minister says the country’s missile capabilities have shifted the strategic balance as the IRGC warns vessels against unauthorized passage through the Strait of Hormuz.

TEHRAN -- A second supertanker carrying more than two million barrels of crude oil struck a naval mine and burst into flames in the Strait of Hormuz on Saturday, the Islamic Revolution Guards Corps (IRGC) said.

In a statement the force declared the strategic waterway closed, warning that ships violating Iranian regulations will burn "in the fire of trust in the American terrorist army," while Iran's acting defense minister said Tehran's missile power, not American bombs, now determines the strategic equation.

The IRGC Navy said in a statement carried that the vessel was attempting to transit the strait illegally after disabling all tracking and radar systems, with deception by the "aggressive American army."

The mine detonated in the ship's engine room, bringing the vessel to a halt. "The Strait of Hormuz is closed, and the fate of violating ships that disobey Iranian regulations in the Strait of Hormuz is burning in the fire of trust in the American terrorist army," the IRGC said.

The incident marks the second such explosion in the waterway on Saturday.

Earlier, a supertanker carrying over 2 million barrels of crude oil was engulfed in flames after striking a sea mine in the Strait of Hormuz while attempting to transit through an unauthorized route with its tracking systems switched off.

On Thursday, a tanker caught fire in the strait after an unauthorized transit with its tracking system switched off. The IRGC has repeatedly warned that vessels violating the waterway's security regulations will face serious consequences.

The closure of the strait follows the collapse of a June memorandum of understanding between Iran and the United States, negotiated with Pakistan's mediation and Qatar's support.

Foreign Minister Abbas Araghchi told the Organization of Islamic Cooperation summit in Baghdad on Saturday that Tehran has conveyed a concrete seven-day plan through Qatar to reopen the waterway.

"If the necessary conditions are met, the Strait can be reopened and normal maritime passage restored within seven days," he said. "The choice now rests with the United States."

Araghchi said maritime traffic had recovered to roughly 60 percent of pre-war levels within two weeks of the MoU's implementation before subsequent U.S. measures obstructed the agreement.

"Security cannot be restored by more of the same," he said. "One cannot bomb a country, threaten its annihilation and impose a blockade, and then expect the security of navigation to return to normal."

The United States and Israel launched their military campaign against Iran on February 28, martyring Leader of the Islamic Revolution Ayatollah Seyyed Ali Khamenei and several senior commanders.

Iran retaliated with waves of missile and drone strikes on U.S. bases and Israeli targets across the region, and has maintained control over the Strait of Hormuz since the early days of the war.

In a post on X on Saturday, acting Defense Minister Brigadier General Majid Ebn-e-Reza dismissed the significance of American military threats, including reports that Washington had developed plans to deploy the GBU-43/B Massive Ordnance Air Blast, known as the "mother of all bombs," against Iranian targets.

"Bombs' title and size do not matter! Your bombs will explode elsewhere; in your global reputation, the U.S. economy, and even your electoral calculations!" he wrote.

"It is our missile power that has changed the equation and brought you to the point where you must already be saying, 'Yes, sir!'"

His remarks followed a CNN report that U.S. President Donald Trump could order renewed strikes on Iranian energy infrastructure and nuclear facilities before or after the November midterm elections, though the White House has not confirmed any such plans.

Trump said this week he would not use nuclear weapons against Iran but declined to rule out the MOAB.