Iranian Mines in the Strait of Hormuz Raise Global Oil Security Concerns
The Strait of Hormuz, the narrow waterway linking the Persian Gulf with the Gulf of Oman, remains a flashpoint as Washington argues for the free passage of global oil shipments. About 20% of the world’s crude oil passes through this choke point, making its security a matter of international consequence beyond the region.
In statements reported by Bloomberg, British Defense Secretary John Healey said the briefing on Iran’s activities around the strait has become clearer, indicating Iran may have started laying mines in the Hormuz. The remarks come amid mixed signals from intelligence assessments about whether mining has begun.
The Institute for the Study of War (ISW) has estimated Iran may have already laid as many as 10 mines in the strait, while President Donald Trump has questioned the reported developments and argued that ships, including tankers, must be allowed to traverse Hormuz. The U.S. military has pursued a broad preventive campaign to deter mining activities in the area.
U.S. Central Command announced it had destroyed more than 30 mine-laying ships in recent operations, reflecting a major counter-mining effort. The strait’s narrowest point is about 34 kilometers, raising the risk that ships could strike floating mines if any are deployed and left unaddressed.
Experts caution that once moored or drifting mines are deployed, elimination is extremely difficult during ongoing hostilities. Healey underscored the wartime challenge of removing mines in disputed waters, while Caitlin Talmage, a political science professor at MIT, noted that mine clearance is typically feasible only in peacetime and becomes dangerous and less reliable amid conflict.
Beyond the mines, Iran’s broader strategy employs asymmetric tools—drones, missiles, and other capabilities—to disrupt shipping and pressure global markets. The Wall Street Journal analyzed Iran’s mining power as a potent lever that could inflict economic damage on the world while leveraging the strategic value of oil facilities and commercial shipping.
Iran’s new supreme leader, Mojtaba Khamenei, used a state television address to stress that the Strait of Hormuz will continue to be used as leverage against Iran’s adversaries, including the United States and Israel. The message underscores a calculated effort to keep Hormuz at the center of regional tensions and international energy policy.
The United States has long warned of the risks to global energy markets and supply chains if Hormuz is blocked or heavily disrupted. U.S. officials have warned that even the perception of disruption can send oil prices higher and ripple through financial markets, with consequences for energy security, inflation, and the broader economy.
Separately, U.S. defense and intelligence concerns extend to capability gaps in mine clearance. The Pentagon has retired its last dedicated mine countermeasures ship and shifted toward coastal combat ships and unmanned surface vessels for mine clearance, a move critics say could leave gaps in detecting and removing mines quickly if tensions flare again. In the past two days, several ships passing Hormuz were reportedly attacked by drones or missile-like projectiles, illustrating Iran’s ability to combine multiple tools in a disruptive campaign.