Iran Deploys Additional Mines in Strait of Hormuz as U.S. Navy Escalates Response, Sources Say
Why It Matters
Iran’s provocative mining of the Strait of Hormuz — the world’s most critical oil chokepoint — is intensifying a military standoff that the International Energy Agency has already described as the largest oil supply disruption in the history of the global market. The escalation threatens energy markets worldwide and has prompted President Donald Trump to issue direct orders to the U.S. Navy to respond with lethal force.
Roughly 20% of the world’s seaborne oil passes through the strait under normal conditions. That flow has now collapsed, with ship traffic falling to single digits on most days — down from more than 100 vessels daily — sending shockwaves through global energy markets larger than the oil shocks of the 1970s.
What Happened
Iran’s Islamic Revolutionary Guard Corps (IRGC) navy laid additional mines in the Strait of Hormuz this week, according to a U.S. official and a source with direct knowledge of the situation. The U.S. military detected the mine-laying operation and has been tracking it closely.
This marks the second time Iran has mined the strait since the conflict began. It remains unclear whether all mines from the first round have been fully located and cleared, raising serious concern about cumulative danger to commercial shipping and naval assets in the region.
President Trump responded swiftly, posting on Truth Social Thursday and ordering the U.S. Navy to “shoot and kill” any Iranian boats caught laying mines — with “no hesitation.” Trump also announced that mine countermeasure operations would continue at a “tripled up level,” signaling a sharp escalation in the American military posture.
By the Numbers
20% — Share of global seaborne oil that passes through the Strait of Hormuz during peacetime.
100+ — Number of ships that previously transited the strait daily; traffic has since collapsed to single digits on most days.
Fewer than 100 — Estimated number of mines Iran had deployed prior to this latest round, according to experts briefed on earlier intelligence assessments.
90%+ — Portion of Iran’s large mine-laying vessels and mine-storage warehouses that U.S. officials estimated were destroyed at the war’s outset — though Iran retained stockpiles along its coastline.
33 — Number of vessels redirected by U.S. Central Command (CENTCOM) since the naval blockade began.
3 — U.S. aircraft carriers now operating in the CENTCOM area of responsibility following the arrival Thursday of the USS George H.W. Bush and its strike group.
Zoom Out
The crisis in the Strait of Hormuz represents one of the most consequential naval confrontations the United States has faced in decades. With three carrier strike groups now positioned in the region, the U.S. has not concentrated this level of naval firepower in the area since the Gulf War era.
Iran’s use of small Gashti vessels — roughly fishing-boat-sized — to carry and deploy two to four mines each highlights a persistent asymmetric warfare challenge. These craft can also be armed with rocket launchers and machine guns, making them capable of threatening large commercial tankers and creating a layered threat environment for U.S. mine-clearing operations.
The broader disruption follows a pattern of Iranian brinkmanship in the strait going back decades. U.S. forces have also recently boarded a sanctioned oil tanker in the Indian Ocean, underscoring the widening scope of American enforcement action against Iranian energy smuggling and weapons trafficking in the region.
What’s Next
The U.S. Navy is currently operating underwater drones in the Strait of Hormuz specifically for mine-clearing operations. Mine countermeasure vessels — including the USS Chief and the USS Pioneer — may also be active in the strait, alongside special mine-hunting helicopters and surveillance aircraft.
Experts caution that clearing operations are inherently dangerous given the threat of Iranian attacks in the narrow waterway. The arrival of the USS George H.W. Bush strike group gives President Trump additional military options should he decide to escalate or resume broader offensive operations against Iran.
With the White House declining to comment on specific intelligence matters and the full scope of newly deployed mines still undisclosed, analysts and allied governments will be closely watching whether diplomatic channels can be reopened — or whether the strait remains on a trajectory toward open naval conflict.