• Iran's Islamic Revolutionary Guard Corps (IRGC) threatens a response 'more lethal' than previous attacks if the U.S. resumes strikes.
  • Tehran reportedly prepares a coordinated retaliation involving allied groups in Lebanon, Yemen, and Iraq, while keeping a narrow diplomatic channel open through Qatari intermediaries.
  • Oil markets remain on edge as Brent crude stays above $100, with the Strait of Hormuz in focus.

IRGC Issues Stark Warning

Iran's Islamic Revolutionary Guard Corps (IRGC) said any new attack on Iran would draw a response "more lethal" than its previous one, according to state media. The warning comes amid heightened tensions with the United States, which has been reinforcing its military presence in the region.

The IRGC's statement is part of a broader deterrence campaign, with Iranian officials reportedly considering wider target sets while still leaving a narrow channel open for mediated diplomacy. No final Iranian retaliation plan has been confirmed publicly.

Broader Response Options Under Review

Senior Iranian commanders are examining a broader, more forceful response if the United States resumes large-scale strikes, Reuters reported, citing people familiar with the matter. Options under review include targets in countries that support U.S. military operations and potentially locations beyond the Middle East, according to the report.

Iran has also instructed aligned groups in Lebanon, Yemen, and Iraq to prepare for a coordinated response in the event of a major renewed attack. That would raise the risk that a bilateral U.S.–Iran confrontation becomes a multi-front regional conflict.

The U.S. is reinforcing regional defenses and naval presence, including additional Patriot air-defense deployments to Saudi Arabia and Qatar and the dispatch of the USS Theodore Roosevelt carrier strike group and USS Makin Island amphibious group, according to reporting cited by RFE/RL.

Diplomacy Clings On

Diplomacy has not disappeared. Tehran submitted a proposal through Qatari intermediaries that would reportedly seek an end to fighting, reopening of the Strait of Hormuz, relief from the U.S. port blockade, access to at least $12 billion in frozen funds, and an oil-sanctions waiver. President Trump said he rejected the proposal, although Tehran subsequently said it received a U.S. response that it was reviewing.

"Iran appears unwilling to answer a symbolic strike with a merely symbolic response," Hamidreza Azizi of the International Crisis Group told Reuters, suggesting Tehran may prefer escalation if it believes that is needed to re-establish deterrence.

Economic Strains Intensify

The confrontation is intensifying pressure on Iran's already-fragile economy. Reuters reports that a U.S. blockade has curtailed oil exports—the government's central revenue source—after years of sanctions and domestic hardship. Preliminary tanker-tracking data showed no Iranian crude loadings in September, although some sales from floating storage continued, according to RFE/RL.

U.S. restrictions on Iranian airlines have reduced international traffic at Tehran's main airport by 42 percent—from an average of 91 daily international flights to 53 after September 23, according to flight-tracking data cited by RFE/RL.

Oil Markets on Edge

The Strait of Hormuz remains the central global economic risk: escalation could disrupt crude and LNG flows. Iran and its partners have used threats to shipping and energy infrastructure to raise costs for the U.S. and its allies. Brent crude had risen above $100 amid the conflict, and refining constraints have contributed to sharply higher diesel prices.

Gulf economies face heightened exposure through oil installations, aviation, ports, insurance costs, and investor confidence. Some Gulf exporters have tried to route shipments around Hormuz-related disruptions.

The principal market mechanism is straightforward: the more credible Iran's ability to threaten Hormuz, Gulf energy infrastructure, shipping, or allied facilities becomes, the larger the risk premium embedded in oil, refined fuels, freight, and insurance.

Background and Outlook

The immediate backdrop is a seven-month conflict that Reuters says began with U.S.-Israeli attacks on February 28. A ceasefire on April 8 ended a 40-day war, but intermittent hostilities have continued. The deeper dispute includes Iran's nuclear program, U.S. economic pressure, Israel's security concerns, and Iran's long-standing effort to deter U.S. and Israeli military action through missiles, drones, naval capabilities, and allied armed groups.

Iran has historically relied on a layered deterrence strategy: ballistic missiles and drones, naval harassment or threats to shipping, cyber and intelligence activity, and relationships with armed groups across Iraq, Lebanon, Yemen, and elsewhere.

Short term, the greatest danger is an action–reaction cycle: another U.S. or Israeli strike, an Iranian retaliation against regional bases, shipping, energy installations, or a partner country, followed by broader counterstrikes. The presence of coordinated Iranian-aligned groups makes containment harder.

Medium term, the conflict is likely to remain shaped by competing pressures. Iran needs sanctions and blockade relief, while the United States seeks constraints on Iran's military and nuclear capabilities. Reuters assesses the immediate odds of a comprehensive agreement as low, even if indirect talks continue.

Long term, three outcomes are plausible: a limited, fragile de-escalation tied to sanctions relief, maritime security arrangements, and nuclear verification; a prolonged low-intensity regional confrontation marked by intermittent strikes, proxy activity, sanctions enforcement, and elevated energy costs; or a wider regional war if attacks spread to countries hosting U.S. forces or supporting U.S. operations—precisely the contingency Iran is reportedly reviewing.

The most important indicators to watch are whether talks through Qatar or other mediators produce a verifiable pause; changes in U.S. force posture; shipping and tanker movements through Hormuz; new sanctions or waivers; and any concrete evidence that Iran or its allied groups have shifted from signaling to operational preparations.

Correction: An earlier version misstated the date of the airline traffic reduction. It was after September 23.