The United States and Iran traded fire in the Strait of Hormuz, raising fears that a fragile ceasefire could unravel. The clash came as Washington awaited Tehran’s response to US proposals aimed at ending the war that began after joint US–Israeli air strikes on Iran on February 28.
What happened
US President Donald Trump said three US Navy destroyers came under attack while transiting the Strait of Hormuz — a crucial maritime chokepoint through which about one‑fifth of the world’s oil and LNG typically moves in peacetime. He said the ships suffered no damage and that Iranian forces were hit. He also reiterated that, despite the exchange, the ceasefire between the two countries remained in effect.
Iran’s military, however, accused US forces of breaching the truce by striking an Iranian oil tanker and another vessel and by carrying out air strikes on Qeshm Island and nearby coastal areas such as Bandar Khamir and Sirik. Iranian air defences were reported to have been activated over western Tehran. Iran said it responded by striking US vessels east of the strait and south of the port of Chabahar; its joint military command claimed the strikes caused significant damage. US Central Command disputed that any US assets were hit. Iranian state media later said conditions on the islands and nearby coasts had returned to normal.
It is unclear which side opened fire; both parties have exchanged occasional incidents since a ceasefire took effect on April 8. Iran has also been responsible for strikes on facilities in Gulf states, with the United Arab Emirates absorbing a number of attacks since the wider conflict began. The UAE Defence Ministry said audible explosions reported across the country resulted from efforts to intercept missiles and drones coming from Iran. Earlier this week, Iran-fired missiles struck the Fujairah emirate, causing a refinery fire.
How serious is this escalation?
While a naval standoff — featuring Iran’s effective closure of the strait and a US blockade of Iranian ports — has been ongoing, Thursday’s exchange represented a sharper confrontation than the intermittent skirmishes seen since the ceasefire. Some analysts describe the clash as a “controlled escalation” intended by both sides to signal resolve while they try to negotiate a deal on key issues, chiefly freedom of navigation through the strait.
Observers say any diplomatic settlement is likely to be limited in scope rather than a broad, comprehensive peace. Negotiators may focus first on restoring passage through the Strait of Hormuz and stabilising trade and shipping, while more complex matters, such as Iran’s nuclear programme, are left for later.
US military officials have framed recent actions in the Gulf as self-defence. There are conflicting accounts about whether US vessels were damaged in Thursday’s encounter, and that dispute underscores the fog that often surrounds fast-moving maritime incidents.
Iranian commentators view recent US moves as an attempt to impose a unilateral reality in the Gulf, akin to ceasefire dynamics seen elsewhere, and argue that any US use of force risks undermining a negotiated truce. At the same time, both sides appear to have an interest in preventing a broader, uncontrolled escalation.
What this means for the ceasefire and diplomacy
President Trump has said the ceasefire remains in place but has warned of further strikes if Iran does not agree to a truce quickly. Iran said it was still reviewing the latest US proposal for a peace framework; Iranian officials indicated a response was being considered and may be relayed through mediators, though reports of a formal reply have not been confirmed.
Diplomatic channels and mediation efforts continue despite the military confrontations. Tehran accuses the United States and Israel of violating the truce, while Washington seeks to ease Iran’s control over the Strait of Hormuz and secure safe passage for international shipping.
Experts say any final framework will require painful compromises or deliberately vague language on the most contentious issues. Both sides have incentives to avoid a wider escalation that would destabilise the region and further disrupt the global economy, but the recent exchange demonstrates how precarious the current ceasefire is and how quickly maritime incidents can test diplomatic progress.