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Iran Conflict 2026
16JUN

Houthis shut a second sea to Israel

4 min read
10:20UTC

The Houthis declared a complete ban on Israeli navigation in the Red Sea on 8 June and fired rockets at the Jaffa area, their first strike on Israel since April. For the first time, both of the region's sea gates are hostile at once.

ConflictDeveloping
Key takeaway

Both regional sea gates now sit hostile at once, removing the reroute that let shipowners absorb one closure.

The Houthis (Ansar Allah, the Iran-backed Yemeni movement) declared a "complete and total ban on Israeli maritime navigation in the Red Sea" on 8 June and fired rockets toward the Jaffa area, their first strike on Israeli territory since the fragile April ceasefire 1. The group said its strikes hit "sensitive Israeli targets" and tied the move to Israeli operations across Gaza, Lebanon, Iraq, Yemen and Iran.

For the first time in this war both of the region's maritime chokepoints sit under hostile authority at once. The Strait of Hormuz already runs under three competing authorities: CENTCOM's blockade from outside Iranian waters, the IRGC's toll from within at up to $2 million a vessel, and the Persian Gulf Strait Authority's registration scheme. The running tally of redirected and disabled ships there had already climbed through early June , days of extra steaming for every tanker forced to swing wide. Now Bab el-Mandeb, the Red Sea's 29-km southern gate between Yemen and Djibouti, carries a declared exclusion on Israeli-linked hulls.

The practical bite runs through insurance, not naval patrols. Protection and indemnity (P&I, marine war-risk) clubs price war risk chokepoint by chokepoint, and a shipowner can route around one closed strait by accepting the cost of the other. With both hostile at once, that hedge collapses for any Israeli-linked cargo, and underwriters have no modern template for pricing a simultaneous Gulf-and-Red-Sea exclusion.

Whether the Houthis enforce the ban by interdiction or leave it declaratory is the open question. The April record, when the group sustained three strikes in three days, suggests they hold the missiles to make it real.

Deep Analysis

In plain English

Yemen's Houthi movement, backed by Iran, declared on 8 June that no Israeli-linked ship may enter the Red Sea , and then fired rockets at the Israeli coast for the first time since April. The Red Sea is one of the world's two main shipping corridors between Europe and Asia. Before this, ships avoiding the Hormuz blockade at Iran's end of the Gulf could reroute through the Red Sea. That option is now closed too. Any Israeli-linked cargo now has to travel the very long way round , either through the Red Sea under fire risk, or around the bottom of Africa , adding weeks and significant cost to journeys that normally take about two weeks.

Deep Analysis
Root Causes

The structural root cause is the Houthis' proven ability to survive sustained US and Israeli air campaigns while retaining functional missile and drone capacity. The April 2026 ceasefire that temporarily halted their strikes was not accompanied by a disarmament or degradation agreement. US strikes in the weeks before the April ceasefire degraded but did not eliminate Houthi launch capacity, and the six-week ceasefire gave the Houthis time to partially restore it.

A second structural cause is the legal gap at Bab el-Mandeb: unlike Hormuz, where Iran's toll claim exploits its status as a littoral state, the Houthis hold no internationally recognised sovereignty over Yemeni territorial waters under the UN-backed Yemeni government's parallel authority. Their declared ban has no legal basis, but enforcement does not require legal authority , only missiles, which they demonstrably retain.

Escalation

Significant lateral escalation opening a second front. The Houthi declaration effectively doubles the chokepoint pressure on Israeli-linked shipping and forecloses the rerouting option that had partially absorbed Hormuz closure costs. The Jaffa rocket strike , first since April , signals resumed Houthi willingness to target Israeli territory, not just shipping.

What could happen next?
  • Consequence

    Lloyd's of London and the International Group of P&I Clubs will reassess war-risk premiums on Red Sea transits, potentially restoring the 2023-2024 rate spike that added $500,000-$1 million per voyage for non-Israeli-linked vessels.

  • Risk

    An Iran-Israel halt that does not include a Houthi stand-down clause will leave the dual-chokepoint condition in place , meaning any deal that reopens Hormuz without addressing Bab el-Mandeb delivers only partial shipping relief.

First Reported In

Update #122 · Trump warns Bibi as Israel strikes anyway

Bloomberg· 9 Jun 2026
Read original
Causes and effects
This Event
Houthis shut a second sea to Israel
With Hormuz and Bab el-Mandeb both under hostile authority, shipowners lose the option of routing around one closed strait by accepting the other, and war-risk insurance has no template to price it.
Different Perspectives
G7 Leaders (ex-US)
G7 Leaders (ex-US)
Kananaskis ended without a joint communique for the first time in the body's history; Macron credited G7 pressure with speeding the ceasefire while Trump publicly denied the summit played any role. The split between US and European G7 partners over what the memorandum means for sanctions relief was the direct cause of the text failure.
Protection-and-Indemnity insurers
Protection-and-Indemnity insurers
London-based P&I mutual clubs declined to underwrite Hormuz crossings while the IRGC Strait Authority remained operational, making the passage commercially impassable regardless of the memorandum's terms. Shipping operators said they would wait weeks for on-water conditions to change before routing tankers through.
IRGC Persian Gulf Strait Authority
IRGC Persian Gulf Strait Authority
P&I mutual insurers declined to underwrite Hormuz crossings on 15-16 June while the IRGC's Strait Authority remained in operation, reducing actual transits to two vessels against a pre-war daily rate of 94. The corps' revenue-generating toll mechanism, created 5 May and collecting $1.5-2 million per VLCC in crypto, has not been stood down and cannot be dissolved by Ghalibaf's signature.
Israeli Cabinet
Israeli Cabinet
Netanyahu admitted he had not seen the memorandum's text but confirmed IDF forces would stay in southern Lebanon; Finance Minister Smotrich called for ten Beirut buildings destroyed per Hezbollah drone and National Security Minister Ben-Gvir said the agreement 'does not bind us in any way'. Israel signed nothing in Islamabad and is the central unresolved variable in the Lebanon clause.
Iranian Majlis hardliners
Iranian Majlis hardliners
Around 60 MPs signed a letter demanding Ghalibaf explain the memorandum; Paydari faction MP Sabeti said the deal violates the Supreme Leader's red lines, and MP Aboutorabi argued the document carries binding obligations 'that cannot be resolved by simply changing the name'. President Pezeshkian defended the negotiators against accusations of betrayal, confirming the fracture inside Iran's political class.
US Vice President JD Vance
US Vice President JD Vance
Vance signed on 15 June and said the memorandum was 'not conditioned on Israel withdrawing from Lebanon' while also saying it 'envisioned a ceasefire that covers both Iran and Lebanon'. The two formulations are incompatible and hand Iran's foreign minister a ready-made violation claim before Geneva.