Houthis Claim Landing Ship Kill Off Mocha as Red Sea Blockade Enters Its Fifth Week

Yemen's Ansar Allah movement says it destroyed a Saudi-led coalition landing ship and damaged four escort vessels off the port of Mocha on August 17, the latest and most serious claim yet in a naval campaign that has run for nearly a month against Saudi-linked shipping in the Red Sea. Neither Saudi Arabia nor coalition defense officials have confirmed the loss of any vessel. The claim, delivered by Houthi military spokesperson Yahya Saree, arrived alongside a separate claim of a drone strike on a Saudi arms depot at the Sahn al-Jin camp in Yemen's Marib governorate — a pairing that has become characteristic of the group's messaging, combining maritime and inland targeting in a single operational narrative. What is verifiable is the campaign's origin point and its earliest confirmed hit. On July 20, the Houthi Humanitarian Operations Coordination Center notified international shipping companies that vessels were barred from loading or discharging cargo at Saudi ports, formalizing a blockade the group has since described as retaliation for what it calls a Saudi siege on Yemen — an allegation Riyadh has rejected. Two days later, on July 22, the group struck two Saudi-flagged tankers, the Encelia and the Layla. The Encelia hit was independently confirmed: UKMTO logged an explosion roughly 70 nautical miles southwest of Al Shuqaiq, and Saudi Arabia's Transport General Authority confirmed the tanker had been struck, with all crew reported safe. The Layla strike has not been independently verified; the vessel's AIS transponder had gone dark days before the claimed attack. Saree used the moment to declare the strait "fully closed" to Saudi-flagged tankers, claiming roughly ten vessels had already reversed course rather than risk transit. The month since has followed a discernible escalation pattern — from tankers, to port infrastructure, to claimed naval assets. By August 9 and 10, strikes had shifted to Mocha's port facilities directly. Yemen's Aden-based government, which controls the city, reported seven fatalities and put damage at approximately $16 million, according to a port director's briefing. The August 17 claims against the landing ship and its escorts represent the campaign's furthest extension yet, targeting the Saudi-led coalition's naval presence rather than commercial shipping or fixed infrastructure. As with the earlier Layla claim, this one currently exists only in Houthi statements; independent verification is pending. What the shipping data actually shows The commercial impact of the blockade is real, trackable, and more specific than the broad-brush "traffic collapse" framing that has circulated. Bab el-Mandeb carried a fairly stable flow of roughly 40 vessels a day through most of July — more than 1,000 transits in the month's first 26 days — before a sharp drop in the final week. Tracking data compiled from Kpler and Windward showed daily commodity-vessel transits falling to just 11 on July 26, including seven tankers, a decline of roughly 73 percent against the month-to-date average and the lowest single-day count in months. Clarksons Research, measuring by tonnage, recorded a parallel roughly 50 percent drop in throughput averaged over July 25–26, with VLCC crossings falling to about one per day from a second-quarter average of three. The picture is not one of sustained collapse, however. Kpler data showed a partial rebound to 25 vessels by July 31, underscoring that operators are recalculating risk on a near-daily basis rather than abandoning the route wholesale. The metric most directly tied to the blockade's stated target — Saudi shipping specifically — comes from Kpler's tracking of crude loadings out of Yanbu: confirmed Saudi crude crossings fell to just six vessels in the six days following the Encelia and Layla strikes, moving an average of about 1.5 million barrels a day, a decline of nearly half from the pre-attack weekly average of roughly 3 million barrels a day. Kpler's own assessment is instructive here — the corridor has not shut down. Saudi-loaded cargo is still moving through Bab el-Mandeb, just at roughly half its prior volume. That distinction matters for how the diversion behavior should be read. Re-routing toward the Cape of Good Hope, or Suez-adjacent U-turns, is concentrated among vessels with Saudi port rotations in their itinerary — crude lifts bound for Asian buyers, in particular — rather than a blanket exodus of all Red Sea traffic. Non-Saudi-linked shipping has continued to transit the strait through the period covered here. Reading the campaign's logic Three drivers appear to be shaping the targeting pattern, based on Houthi statements and the sequencing of strikes. The first is local: retaliatory dynamics tied to reported Saudi-backed Yemeni government force movements around Marib and the Tihama coastal front, which the group has cited directly in justifying strikes on military positions. The second is economic leverage — the Houthis have been explicit in framing this as a "blockade for blockade" strategy, using control of a 26–29 kilometer chokepoint to impose costs on Riyadh that scale with the duration of the campaign. The third is the wider regional environment: the campaign is unfolding against the backdrop of continued Iran-US-Israel tensions that have already depressed traffic through the Strait of Hormuz, meaning Gulf shipping is currently absorbing pressure at two chokepoints simultaneously rather than one. Whether the August 17 landing-ship claim holds up to scrutiny will matter less, in the near term, than whether the campaign's core commercial pressure — the Yanbu crude-loading drawdown — persists or eases. That is the metric worth watching over confirmation of any single strike. Sources: Reuters, Al Jazeera, Seatrade Maritime, Splash247, Kpler, Clarksons Research, UKMTO, Xinde Maritime News, ANI, Türkiye Today. Houthi-attributed claims sourced to Yahya Saree statements via Telegram/X, cross-checked against independent confirmation where available.