Iran appears to be shifting toward a more aggressive maritime strategy after a September recovery in oil shipments through the Strait of Hormuz, even as diplomatic exchanges with Washington continue. The renewed attacks on commercial vessels, combined with escalating fighting in Yemen and threats to Saudi energy infrastructure, suggest Tehran may be seeking to restore economic leverage that had weakened as regional oil exports recovered. But the escalation comes as the United States intensifies its economic blockade of Iran and considers further military action, creating a dangerous confrontation in which both sides are increasing pressure while continuing to negotiate.
Throughout September, oil shipments from the Persian Gulf recovered substantially despite the ongoing war. According to shipping intelligence firms Kpler and Vortexa, Middle Eastern crude exports exceeded prewar levels on 14 days during the month, supported by increased Saudi and Iraqi shipments and alternative transportation arrangements. Oil flows through Hormuz recovered to approximately 80 percent of prewar levels, while a complex network of smaller vessels, transfers and alternative routes helped exporters circumvent some of the restrictions imposed by Iran.
The recovery coincided with renewed diplomatic efforts surrounding the United Nations General Assembly in New York. Iranian officials had expressed hopes that negotiations could produce an agreement, and Tehran proposed a framework under which Hormuz could reopen within seven days in exchange for steps addressing the American blockade, sanctions and the broader conflict.
Those expectations were not realized. President Donald Trump rejected Iran’s September proposal, while Washington continued its naval blockade of Iranian ports. Although negotiations continued through intermediaries, the United States maintained restrictions on Iranian oil exports even as other Gulf producers increasingly restored shipments.
The imbalance became an important issue inside Iran. While neighboring countries were again benefiting from oil exports, Iran remained largely excluded from international energy markets. Iranian officials and commentators questioned the effectiveness of restrictions on Hormuz if other producers could continue exporting while Iran’s own oil revenues remained severely constrained.
Since early October, however, the maritime situation has changed sharply. Iranian attacks on commercial shipping have intensified, with several tankers struck in and around Hormuz. On October 8, a vessel identified as the Acers was hit by projectiles approximately 90 kilometers north of Qatar, demonstrating that the danger was no longer confined to the strait itself.
Iranian military officials have also signaled an expansion of their operations. Mohammad Reza Naqdi, an adviser to the IRGC commander, warned that shipping routes Tehran considers unauthorized would soon be blocked. Iranian media subsequently reported explosions involving vessels allegedly striking naval mines in the Strait of Hormuz, although the circumstances could not be independently verified.
On October 9, the IRGC Navy reported striking an LPG carrier it accused of violating Iranian maritime restrictions. Iranian commanders have warned that vessels using unauthorized routes could face attacks beyond the immediate Hormuz area.
The escalation appears intended to demonstrate that the recovery in Gulf oil exports remains vulnerable to Iranian military pressure. According to Reuters, the recent attacks have already reduced shipping traffic and raised concerns among insurers and energy traders. Brent crude rose above $105 per barrel on October 8 before easing on Friday following Trump’s comments about continuing negotiations.
On October 8, the U.S. Treasury announced new sanctions against Iranian oil transportation networks, including 17 vessels, as part of its Operation Economic Outcast campaign. American officials argue that the blockade and sanctions are depriving Tehran of the revenues needed to sustain the war.
In an interview with BBC Persian, Treasury Under Secretary Erin Brown claimed that only approximately $1.5 billion worth of Iranian oil remained outside the blockade and suggested that Washington was approaching the point of eliminating Iran’s remaining oil revenue. However, these claims have not been separately substantiated. She also expressed hope that economic pressure would ultimately bring about the end of Iran’s current government..
Iranian officials offer a sharply different assessment. Central Bank Governor Abdolnaser Hemmati said Tehran had supplied $2 billion to the foreign-exchange market and moved significant foreign-currency resources into safer accounts. Yet the rial’s depreciation, with the dollar recently trading around 270,000 tomans, illustrates the severe pressure on Iran’s economy regardless of the government’s assurances.
The confrontation is therefore increasingly economic as well as military: Washington is attempting to restrict Iran’s access to oil revenues, while Tehran appears determined to demonstrate that other regional exporters cannot operate normally without an agreement.
A second source of pressure is developing in Yemen, where Saudi Arabia’s major military operation against the Iran-aligned Houthis has produced a contested outcome. Saudi-backed Yemeni forces, supported by extensive airstrikes, initially claimed to have recaptured strategic coastal positions near the Bab al-Mandab Strait. However, subsequent developments indicated that the Houthis had maintained their control over the strategic waterway, despite the Saudi-led offensive. Meanwhile, Houthi advances around Taiz have effectively encircled the long-besieged city and threatened the remaining government-aligned positions, raising the possibility of a major strategic gain for the movement. While the city has not yet fallen, the tightening siege further complicates efforts to dislodge the Houthis from strategic positions in southwestern Yemen.
The Houthis have also intensified attacks on Saudi airports and energy infrastructure. Missile strikes on Riyadh’s international airport on October 8 killed three people and damaged a Saudi passenger aircraft, according to Reuters. Continued threats to Saudi oil facilities could undermine alternative export routes, particularly the east-west pipeline system that allows Saudi Arabia to bypass the Strait of Hormuz.
Although direct Iranian coordination of the latest Houthi operations has not been established, the simultaneous threats to Hormuz and Red Sea shipping increase the potential economic consequences of a prolonged conflict. Saudi Arabia’s ability to export oil through the Red Sea becomes especially important when Gulf shipping is disrupted.
Despite these developments, diplomatic contacts between Tehran and Washington remain active. On October 8, Foreign Minister Abbas Araghchi confirmed that Iran was reviewing Washington’s response to its seven-day proposal and expected to submit its own reply within days. President Masoud Pezeshkian subsequently told Russian President Vladimir Putin that Iran had proposed amendments to American ideas and would continue negotiations through intermediaries. Putin offered Russian assistance in efforts to end the conflict.
The central disagreement appears to entail when and whether the United States will ease its blockade and whether the parties can reach any more tangible understandings on Iran’s nuclear program. Vice President JD Vance has called for meaningful reductions in Iran’s enrichment capacity, while Iranian officials insist that the country’s right to enrichment must be recognized. Atomic Energy Organization chief Mohammad Eslami has also ruled out surrendering Iran’s enriched uranium stockpile.
Military escalation still looms large. Axios and The Atlantic reported that the Pentagon had been preparing options for renewed large-scale strikes against Iran, potentially before the November 3 U.S. midterm elections. Trump subsequently described negotiations as productive and said he would not attack Iran before the elections. His statement temporarily eased oil-market concerns, but it did not resolve the underlying confrontation. Misdirection has been a major part of recent American and Israeli attacks on Iran.
The emerging pattern suggests that Tehran may be attempting to make continued confrontation more costly for Washington while keeping a negotiated settlement possible. Iran’s ability to disrupt regional energy exports provides leverage, but it also risks provoking further American military action and damaging relations with neighboring countries.
For Washington, the challenge is different: its blockade has severely constrained Iran’s oil exports, but the recovery of regional energy shipments remains vulnerable to renewed attacks. Neither side has demonstrated that economic and military pressure alone can produce its desired outcome.
The coming days may therefore prove consequential. Iran is preparing its response to the latest American proposal while simultaneously demonstrating that the economic costs of the war can extend far beyond its own borders. Whether these pressures accelerate an agreement or trigger another escalation remains uncertain.