17JUN

Radio warnings close a second strait

3 min read

10:21UTC

Yahya Sarea declared Bab al-Mandab shut to Saudi shipping on Monday. Six vessels, among them the Chinese supertanker Xin Long Yang, had turned round inside 48 hours without a shot fired.

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Key takeaway

A radio broadcast closed Bab al-Mandab to Saudi shipping inside 48 hours, with no shot fired.

Yahya Sarea, military spokesman for Yemen's Houthis, announced a full maritime embargo on Saudi Arabia on Monday 20 July, effective immediately⁠¹. Houthi forces began hailing vessels on open maritime frequencies near Yemen the same day, telling them the Bab al-Mandab was closed to Saudi traffic⁠².

Bab al-Mandab is the strait between Yemen and Djibouti where the Red Sea meets the Gulf of Aden, and roughly a quarter of global container traffic passes through it. Six vessels had reversed course by Tuesday 21 July, according to Lloyd's List ship-tracking data. Among them was the Chinese Very Large Crude Carrier Xin Long Yang, which turned in the Red Sea rather than continue towards a Saudi port⁠³.

Houthi forces fired nothing, boarded nothing and stopped nothing. Rear Admiral Vasileios Gryparis commands Operation Aspides, the European Union's naval protection mission in the Red Sea. He said the Houthis "remain a threat to navigation despite not having attacked any merchant vessels since September 2025"⁠⁴. Holding the Strait of Hormuz shut has cost a great deal more: a naval blockade, Marine boarding parties putting armed personnel on foreign decks, and eleven consecutive nights of bombing.

Sarea framed the embargo as retaliation for Saudi Arabia's blockade of Yemeni ports and a Saudi strike on Sanaa airport. The Houthis say that strike was aimed at an Iranian aircraft carrying their leadership home from Ali Khamenei's funeral⁠⁵. Saudi Arabia's foreign ministry called the declaration false and a distraction from the group's "economic mismanagement and public discontent", and said The Kingdom would take "all necessary measures" to protect its ships⁠⁶.

Whether the six turnbacks answer the radio calls, the owners' own risk desks or both cannot be separated out from tracking data alone. No war-risk premium specific to Saudi-bound traffic has yet been established either. What can be said is that the traffic changed course within two days of a broadcast, and that nobody had to sail a warship to make it happen.

Deep Analysis

In plain English

The Houthis are an armed group that controls large parts of Yemen. On Monday they announced they would stop Saudi-bound ships from passing through the Bab al-Mandab Strait, a narrow sea gap near Yemen that a huge share of world shipping uses to reach the Suez Canal. They have not fired on or boarded any ship. Instead, Houthi forces have been radioing vessels over open radio channels and warning them to turn back. Six ships did, including the Chinese supertanker Xin Long Yang. No vessel has been attacked, boarded or stopped. Shipping companies are cautious because insurance for sailing through this region has already become far more expensive during the wider war, so a warning alone is often enough to make a captain choose the longer, safer route.

Deep Analysis

Root Causes

Rerouting on a radio warning only works because the insurance market had already primed shipowners to treat any new threat as decisive. War-risk premiums for the region were running at 3-10% of hull value before this declaration, against roughly 0.25% before the war, according to Lloyd's List reporting; the Lloyd's Market Association has said capacity technically remains available and it is price and crew willingness, not a shortage of cover, that is doing the suppressing.

That pre-existing cost structure means a six-figure premium swing, not a missile, is enough to turn a tanker around; the Houthis are exploiting a market that was already primed to divert rather than demonstrating new military reach.

What could happen next?

Risk
If the Houthis follow the 2023 Galaxy Leader precedent and escalate from radio warnings to an actual boarding or strike, war-risk premiums for the wider Red Sea corridor would likely reprice sharply, compounding the existing Hormuz premium.
Precedent
A second chokepoint closed by declaration rather than force lowers the bar for further non-kinetic threats against shipping elsewhere in the region.

Source Landscape

This story draws on mixed-leaning sources from United States and Qatar

United States

Qatar

LeftRight

Primary parallel: The Houthis' own November 2023 blockade declaration against Israeli-linked shipping was followed within three weeks by a kinetic act, the seizure of the Galaxy Leader, that converted the threat into a demonstrated capability and reset how the entire market priced Red Sea risk.

Counter-parallel: No equivalent kinetic follow-through has occurred here in the two days since the 20 July declaration; Bab al-Mandab traffic is reportedly diverting on warning alone, a pattern closer to a reputational deterrent than to the 2023-24 campaign it is being compared against.

Consensus view: EUNAVFOR Aspides commander Rear Admiral Vasileios Gryparis has stated on record that the Houthis have not attacked a single merchant vessel since September 2025, reading the six diversions as owners and insurers pricing in a threat rather than responding to any demonstrated capability.

Counter-view: Saudi Arabia's Foreign Ministry has rejected the blockade declaration outright, framing it as a manufactured distraction from what Riyadh calls the Houthi movement's own economic mismanagement and domestic discontent, rather than a credible maritime threat at all.

Key tension: Whether a chokepoint can be closed by announcement alone when the last confirmed attack is ten months old, or whether Riyadh's dismissal understates how thin the margin for error has become for shipowners already paying Hormuz war-risk rates.

Sources:The War Zone·Al Jazeera

Mentions:Houthis →Yahya Saree →Bab al-Mandeb →Saudi Arabia →Operation Aspides →Strait of Hormuz →Riyadh →Lloyd's List →Galaxy Leader →Ali Khamenei →European Union →Yemen →Red Sea →VLCC →Lloyd's Market Association →Suez Canal →Gulf of Aden →

First Reported In

Update #159 · A second strait closes by radio alone

The War Zone· 22 Jul 2026

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Causes and effects

Caused by

Marines start boarding ships off Iran

The forcible Hormuz naval blockade and boarding regime contrasts with the costless Bab al-Mandab closure achieved by radio alone.

Occurred 15 Jul 2026

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This Event

Radio warnings close a second strait

Two of the world's maritime chokepoints are now constrained at once, and the second one cost its enforcers nothing but a transmitter.

Led to

Houthis fire on the Saudi tanker Encelia

The 20 July radio-only closure of the Bab al-Mandab escalated into a missile strike on the Encelia.

Occurred 21 Jul 2026

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Tanker NCC Masa struck off Al-Shuqaiq

The NCC Masa strike follows the Houthi blockade declaration against Saudi-linked shipping.

Occurred 24 Jul 2026

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Different Perspectives

French Football Federation

The FFF called an 11:00 CEST press conference for 28 July, at its Paris headquarters, following an extraordinary executive committee meeting, at which Zinedine Zidane is expected to be presented as head coach succeeding Didier Deschamps. As of this writing no communique confirms the appointment, contract length or start date.

Morocco

Morocco is pushing for the 2030 final at its Grand Stade Hassan II in Casablanca, a planned 115,000-seat venue that would be the world's largest football stadium on completion. The venue is contested by a Spanish petition for the Santiago Bernabeu, and FIFA has fixed neither the venue nor the tournament's proposed 64-team format.

FIFA

FIFA's first tournament report, published 27 July, itemises nearly 300,000 accredited personnel, 73,700 security staff and 300,000 square metres of custom-grown turf, with no revenue or cost figure attached. As a Swiss association answering to its own Congress rather than a treasury, FIFA has followed the same operational-before-financial sequence it used after Qatar 2022.

Javier Tebas / La Liga

La Liga president Javier Tebas said on 21 July that FIFA's system is rotten from the root and that Gianni Infantino's time as president has, in his words, concluded. Tebas has no vote in FIFA's process, so days after the IOC declined jurisdiction over a separate ethics complaint, he used the only instrument he has.

Mexico City government

Head of government Clara Brugada presented a closing report on 22 July crediting the tournament with 44 billion pesos of economic activity, 2,000-plus accelerated public works and 100,000 formal jobs in June alone. The city has not published the method behind that figure, and three other Mexican bodies count the same five weeks differently.

Town of Foxborough

Foxborough answered Kraft Group's June lawsuit on 7 July with a 61-page counterclaim, calling the stadium's owners 'a collection of multibillion-dollar corporations' trying to shift its $7.8 million security bill onto taxpayers. The town says its licensing power and its billing power run through the same board, and it wants the court to award its own costs too.