As of 07:31 Beijing time on September 13, diplomacy had continued over the previous 24 hours without easing shipping risks or conflict spillovers. Iranian sources said an understanding with Oman did not mean immediate Hormuz reopening. The Houthis claimed an attack on a Saudi military base, while Saudi civil defense separately reported injuries from a fallen projectile. Reopening and de-escalation still required fulfillment of negotiating conditions and actual security improvements.

Strait talks advance, but navigation remains constrained

Iran–Oman talks coexist with two designated daily shipping-protection windows.
Original Chinese illustration · English guideDiplomatic consultations versus practical shipping conditions. The left labels Iran and Oman around a table and a Hormuz map. The right labels the Strait of Hormuz between Iran and Oman and specifies two designated time windows each day. The figure separates talks from the operating restrictions on protected passage.

Reuters on September 12 cited Iranian sources reported by Tasnim as saying the Iran–Oman understanding only laid groundwork for future reopening. Passage still depended on Washington meeting Iranian conditions. Route discussions had progressed, but actual clearance remained tied to U.S.–Iran political terms.

Protection also had time limits. The Financial Times disclosed an email from a U.S. naval coordination body to maritime advisers showing air protection had been reduced in early September to two designated daily windows because Iran increased attacks on night sailings. Reuters relayed that Washington had protected ships along the southern Hormuz route near Oman's coast since May.

The arrangement was disclosed that day but changed in early September. Shipowners had to follow both designated routes and protection windows; waiting and security assessments affected transport. Stable passage still required resolution of clearance conditions, protection arrangements and maritime safety.

Houthis claim a Saudi attack as Bab el-Mandeb risks persist

A Houthi claim of 129 strikes in 48 hours accompanies Bab el-Mandeb risk imagery.
Original Chinese illustration · English guideSaree also claims 129 airstrikes over the past 48 hours. The large figures remain explicitly attributed claims. The adjacent shipping background is labeled Bab el-Mandeb and Saudi Arabia, relating the conflict to the other regional waterway without presenting an independently verified strike count.

Earlier Houthi advances toward Yemen's Red Sea coast and Perim Island increased tension at Bab el-Mandeb. On September 12, spokesman Yahya Saree claimed ballistic missiles and drones struck ammunition depots and command facilities at a Sharurah military base in Saudi Arabia. He threatened deeper attacks if Saudi operations continued. Hits and results remained unilateral Houthi claims.

Saree also claimed Saudi aircraft carried out 129 strikes over the preceding 48 hours in Taiz, Marib, Hodeidah and elsewhere. Saudi civil defense separately said a projectile landed in Al-Tuwal in Jizan, injuring two people and damaging a mosque, buildings and vehicles.

The Houthis emphasized restrictions on Saudi vessels while saying other countries' ships could pass Bab el-Mandeb. This was no security guarantee, but did not mean the strait was closed to all merchant traffic. Sustained safe passage depended on coastal fighting and maritime attack risks.

Multiple parties seek de-escalation while fighting continues on surrounding fronts

Iraqi border restrictions, Omani contacts and Lebanon talks delayed until October.
Original Chinese illustration · English guideRegional diplomacy and restrictions: Iraq has three border crossings with Iran affected; Oman and Lebanon are identified beside meeting and telephone imagery; the next talks are postponed until October, shown on a calendar. These labels accompany the article's border closures, Omani consultations and postponed Lebanon talks rather than a single common agreement.

Araghchi and Iraqi Foreign Minister Hussein discussed border stability and security by telephone. Al Jazeera reported Iraq had temporarily closed three Iranian border crossings in connection with an investigation into drone launch sites after the Saudi East–West pipeline attack. The ministers emphasized coordination to prevent escalation and wider conflict.

Araghchi also discussed Hormuz and attacks on Saudi Arabia with Turkish Foreign Minister Fidan and continued consultations with Omani Foreign Minister Badr. Qatar's prime minister and Jordan's foreign minister exchanged views on easing tensions; Qatar emphasized freedom of navigation and conditions for broader regional peace.

Fighting persisted in Lebanon. Israel struck near Haris and the Ali al-Taher heights in the south. Media also reported the next U.S.-mediated Israel–Lebanon talks, due in Rome this month, had been postponed to October. Diplomacy preserved room for easing, but reopening, border security and ceasefire talks faced separate obstacles; progress in one channel had not cooled the region as a whole.

Key developments

Timed updates on Hormuz, border security and Iran–Turkey diplomacy.
Original Chinese illustration · English guideThree Beijing-time publication checkpoints on September 13: 00:45, Strait of Hormuz; 05:30, shared-border security; 06:45, Iran and Turkey. Ships, a border and telephone, and a conference setting respectively illustrate the reopening conditions and diplomatic contacts described in the timeline.

In reverse order of publication, all Beijing time.

Key developments

Iranian and Turkish foreign ministers discussed Hormuz, attacks on Saudi Arabia and regional conflict, emphasizing containment; Iran also consulted Oman.

Army commander Hatami and IRGC commander Vahidi met and warned of swift, forceful responses to new attacks.

Pezeshkian said on social media Iran would not yield to U.S. pressure and accused Washington of attacking civilian infrastructure and essential supplies.

Saree claimed missiles and drones attacked ammunition and command facilities at Sharurah; results were not independently confirmed.

Media reported the next Rome Israel–Lebanon talks were postponed from this month to October.

Iranian and Iraqi foreign ministers discussed shared-border security after Iraq temporarily closed three crossings.

The Houthis claimed 129 Saudi airstrikes in 48 hours across Taiz, Marib, Hodeidah and elsewhere.

Qatar's prime minister and Jordan's foreign minister discussed easing tensions; Qatar stressed navigation freedom and comprehensive peace.

Saudi civil defense said a projectile landed in Al-Tuwal, Jizan, injuring two and damaging buildings and vehicles.

Israel struck near Haris and the Ali al-Taher heights in southern Lebanon.

Houthi officials told AFP they had freed 210 detained members in recently seized areas; this was not the number newly released that day.

Reuters cited Iranian sources saying the Oman understanding did not mean immediate Hormuz reopening, which still required U.S. fulfillment of Iranian conditions.

Reuters relayed an FT disclosure that U.S. air protection for relevant tankers had been reduced in early September to two designated daily windows.