Middle East — 2026-09-29

Eight US Marines Injured Aboard Mystery Vessel Struck by Iranian Cruise Missile in Strait of Hormuz

BLUFDelayed Pentagon disclosure of Marines embarked on a contracted vessel inside the Hormuz threat envelope exposes an operational posture that Congress and allied shippers will demand answers about.

NBC News reported on Sunday, citing three US officials, that an Iranian cruise missile struck a vessel in the Strait of Hormuz on September 14, injuring eight Marines (seven enlisted, one officer) who were operating aboard as part of a battalion landing team 12. The Marines suffered smoke inhalation and possible traumatic brain injuries, were not seriously hurt, and returned to duty soon after; the vessel was not a US Navy ship, and officials did not identify it 123. gCaptain reported the Marines were added to the Pentagon casualty database about 10 days later, and CENTCOM declined comment 2. The War Zone reported that UKMTO logged only one vessel struck that day, later identified by trade press as the M/V St. Helena, but could not confirm Marines were aboard 4.

Analysis
Marines are embarked on commercial shipping inside the Hormuz threat envelope, and the Pentagon withheld the strike for two weeks. NBC News, citing three unnamed officials, is the only primary source, and the other outlets amplify it without independently confirming the Marines' presence. Trade press names the St. Helena, an Ambrey-operated vessel, which points to a contracted armed-security or sea-base arrangement rather than a Navy platform. The case marks the first reported US Marine casualties from an Iranian cruise missile, escalating scrutiny of casualty reporting. We cannot assess with confidence when or whether CENTCOM will identify the vessel or explain the mission, since no forecast-grade disclosure indicator exists. The Marines may instead have been on routine escort work, and the St. Helena link may not match NBC's vessel.

4 sources

U.S. Marines injured in recent Iranian attack - NBC News
NBC News: Eight Marines Injured in Previously Undisclosed Iranian Attack in Hormuz - gCaptain
Eight US Marines injured in recent, undisclosed Iranian attack on ship in Hormuz - The Jerusalem Post
Claims Swirl Around U.S. Marines Injured Aboard Mystery Vessel Attacked In The Strait Of Hormuz - The War Zone