Iran warned Thursday that the Strait of Hormuz is an "unbreakable red line" in response to threats from U.S. President Donald Trump [1].

The escalation marks a critical flashpoint in Middle East security, as both nations threaten to target strategic energy infrastructure that sustains global oil markets.

Iranian military spokesperson Ebrahim Zolfaghari said the country would retaliate with "steel strikes" if the U.S. carries out threats to attack regional assets [1]. Zolfaghari said that Iran would obliterate regional infrastructure if the red line is crossed [1].

These warnings follow statements made by President Trump on June 11, when he said the U.S. would target Iranian infrastructure [2]. Trump specifically warned that the U.S. would seize oil infrastructure points, including Kharg Island [2]. During those remarks, Trump described the potential actions as "VERY HARD TONIGHT" [2].

Kharg Island serves as a primary terminal for Iranian crude oil exports. The threat to seize the island targets the core of Iran's economic ability to fund its government, and military operations.

Iran's response focuses on the Strait of Hormuz, a narrow waterway through which a significant portion of the world's petroleum passes. By designating the strait as an unbreakable red line, Tehran is signaling that any U.S. move toward its oil islands could result in the closure of the waterway — an act that would likely trigger a global energy crisis.

President Trump has previously said that his threats are intended to pressure Iran regarding regional security and ongoing negotiations [2]. However, the Iranian military maintains that any strike on its soil will be met with a proportional and devastating response [1].

“"unbreakable red line"”

The exchange highlights a shift toward high-stakes brinkmanship centered on energy choke points. By targeting Kharg Island, the U.S. focuses on Iran's revenue stream, while Iran's focus on the Strait of Hormuz leverages global economic vulnerability to deter military action.