Bahrain Missile Strike Report Challenges Iran Blame, Suggests US-Operated Patriot Missile

A residential explosion in Bahrain that Washington and Manama blamed on an Iranian drone was most likely caused by a US-operated Patriot interceptor missile, according to an independent analysis that the Bahraini government has now been forced to partially acknowledge.

Academic researchers at the Middlebury Institute of International Studies at Monterey concluded with 'moderate-to-high confidence' that the pre-dawn blast on 9 March 2026 in the Mahazza neighbourhood of Sitra island, which injured 32 people, including children, originated from a Patriot air defence battery located approximately 6.4 kilometres southwest of the site.

Reuters, which commissioned the analysis and had it reviewed by independent experts, published the findings on 23 March. In response to Reuters' questions, Bahrain acknowledged for the first time that a Patriot missile was involved in the explosion, a significant revision of the official account it had maintained for nearly two weeks.

The blast occurred on the same night that Iranian drones struck the nearby Bapco Energies refinery on Sitra island, prompting Bahrain's state-owned oil company to declare force majeure on its shipments within hours. The proximity of the two events shaped the initial framing.

What the Middlebury Analysis Found

The analysis was conducted by research associates Sam Lair and Michael Duitsman and Professor Jeffrey Lewis, all of the James Martin Center for Nonproliferation Studies at the Middlebury Institute.

Their methodology relied on open-source visuals, including footage posted to social media from a Riffa apartment block at approximately 02:00 local time on 9 March, as well as commercial satellite imagery of the blast site and surrounding area. The key video shows a missile travelling at low altitude on a north-easterly trajectory before angling downward and detonating, with a flash visible 1.3 seconds before the clip ends.

The researchers geolocated the launch footage to a district of Riffa, Bahrain's second-largest city. Reuters independently confirmed that geolocation. From trajectory and launch angle, Lair, Duitsman, and Lewis calculated that the missile originated from a US Patriot battery roughly 6.4 kilometres to the south-west of the Mahazza neighbourhood.

The analysis further noted that blast damage was concentrated along four streets, consistent with aerial detonation, and that shrapnel had scattered approximately 120 metres from the central impact zone, matching the fragmentation pattern of a Patriot warhead exploding in mid-air.

Reuters showed the full Middlebury analysis to two additional target-analysis experts and one Patriot system researcher, none of whom disputed its conclusions. Wes Bryant, a former senior targeting adviser and policy analyst at the Pentagon, said the researchers' findings were 'pretty undeniable.' Raytheon, the Patriot's manufacturer and a division of RTX Corp., did not respond to a request for comment.

Washington's Denial and Bahrain's Partial Admission

On 9 March, within hours of the blast, US Central Command published a post on X categorically rejecting any suggestion that a Patriot had caused the damage. The post described Iranian and Russian reports attributing the explosion to a failed US interceptor as a 'LIE,' capitalised in the original, and stated that an Iranian drone had struck the residential area.

A senior White House official, responding to Reuters' questions, said the United States was 'crushing' Iran's ability to produce or launch drones and missiles, and added that the US military 'never targets civilians.'

The official provided no direct response to questions about the Patriot finding. Bahrain, for its part, issued a statement acknowledging Patriot involvement but maintaining that civilian casualties 'were not a result of a direct impact to the ground of either the Patriot interceptor or the Iranian drone.'

The Bahraini government offered no explanation for why it had withheld any mention of the Patriot for nearly a fortnight. Iran's mission to the United Nations did not respond to Reuters' request for comment on the Mahazza incident.

Sitra Island, Bapco's Force Majeure, and the Cost of Air Defence

Sitra island sits at the heart of Bahrain's energy infrastructure and carries strategic weight in the wider conflict. The island is home to the Bapco Energies refinery, recently upgraded at a cost of several billion dollars to a capacity of 405,000 barrels per day, making it one of the Gulf's most significant refining facilities.

On the night of 9 March, Iran struck the refinery complex directly. Bapco, in an official statement reproduced by Bahrain's state news agency, invoked force majeure, citing 'the ongoing regional conflict in the Middle East and the recent attack on its refinery complex.' The company said domestic fuel supplies would continue but halted international export commitments.

That attack on the refinery ran simultaneously with the Mahazza incident, a fact that shaped how quickly events were attributed. The fog of an active air defence engagement made rapid, accurate attribution hard, though it does not explain why the official narrative was left unchallenged for nearly two weeks despite the video evidence that circulated on social media the same morning.

The incident exposes a structural tension in modern air defence. As the analysis noted in its reporting, the use of advanced, expensive interceptors like the Patriot, which costs roughly £2.3 million ($3 million) per missile, to counter far cheaper Iranian drones has been a defining feature of the war.

A Patriot interceptor that detonates in the air over a residential neighbourhood, regardless of whether it kills a drone, still carries a powerful warhead and large shrapnel field. Defence and industry officials told Reuters that Patriot misfires are rare but not unknown, citing a 2007 incident in which an errant Patriot struck a farm in Qatar.

The Bahrain case adds to a growing record of incidents, including the reported February strike on an Iranian girls' school that US investigators also believe was caused by erroneous American targeting data, in which the official account and the physical evidence pointed in different directions.

In a war where the official record and the open-source evidence have repeatedly diverged, the question is no longer just who fired the missile, it is who controls the account of what happened after.