FBI Warned California Police Iran Could Retaliate With Drones at the West Coast

For days, the biggest homeland question hanging over the U.S.-Iran war has been whether retaliation would stay overseas. A newly disclosed FBI alert suggests federal authorities have been taking seriously a much darker possibility: that Iran could try to bring the conflict to the American mainland by launching drones toward California from offshore. According to ABC News, the FBI warned police departments in California in recent days that Iran could retaliate for U.S. attacks by launching drones at the West Coast, based on information indicating that as of early February 2026, Iran had allegedly aspired to carry out a surprise UAV attack from an unidentified vessel off the U.S. coast against unspecified targets in California if the United States struck Iran.

The language of the alert is striking, but so is its uncertainty. ABC reported that the bulletin said authorities had no additional information on timing, method, target, or perpetrators. The FBI’s Los Angeles field office declined to comment to ABC, and the White House did not immediately respond. That means this should not be read as proof that a California drone strike is imminent or that officials have identified a specific launch platform already sitting off the coast. It should be read as something narrower but still serious: a warning that federal authorities believed the scenario was credible enough to push down to state and local law enforcement.

What makes the alert more important is that it fits a broader pattern of U.S. threat reporting since the war began. Reuters reported on March 2 that a Department of Homeland Security intelligence assessment warned Iran and its proxies could target the United States following the killing of Iran’s supreme leader, even while judging that a large-scale physical attack on the homeland was unlikely. That assessment said Iran and its proxies probably pose a persistent threat of targeted attacks inside the United States, with cyberattacks seen as the more immediate short-term concern. A few days later, Reuters also reported that the White House temporarily halted a separate federal security bulletin about Iran-related threats that had been intended for state and local law enforcement, pending review. In other words, the California alert did not arrive in a vacuum. It arrived amid a clear ramp-up in federal concern about retaliation on U.S. soil.

That is why the California angle is so unnerving. The alert does not just raise the prospect of retaliation in the abstract. It points to a very specific model of attack: drones launched from an unidentified vessel off the U.S. coast. That matters because it would bypass some of the assumptions many Americans still make about distance and deterrence. A threat launched from Iranian territory against the U.S. mainland would sound logistically extreme. A threat launched from a ship positioned offshore is a different kind of problem entirely. It compresses warning time, complicates attribution, and forces law enforcement to think less about missiles crossing oceans and more about small, relatively cheap systems that can be launched from much closer in. That is an inference from the alert’s scenario, but it is exactly why such a bulletin would be sent to police in California rather than handled only as a distant strategic concern.

And while the scenario sounds like something out of a thriller, the maritime-drone piece is not science fiction. Reuters reported in February 2025 that Iran’s Revolutionary Guards took delivery of the country’s first ship capable of launching drones and helicopters at sea. Reuters said the converted commercial vessel was equipped with a 180-meter runway and could operate for up to a year without refueling, according to Iranian state-linked reporting. Then, on March 5, Reuters reported that the U.S. military said it had already sunk more than 30 Iranian ships during the current war, including an Iranian drone ship that was burning. Those facts do not prove Iran positioned such a vessel off California. They do show, however, that sea-based drone operations are part of Iran’s military toolkit and part of the U.S. military’s threat picture.

Reuters has also reported that Iran’s latest generation of Shahed-136 drones can have a range of roughly 700 to 1,000 kilometers when launched from Iranian territory or from vessels, according to analyst Farzin Nadimi, and that Iran has significant industrial capacity to keep producing drones. That reporting was focused on Hormuz and the Gulf, not the U.S. West Coast, but it reinforces the broader point: Iran is not merely using drones as battlefield accessories. It is using them as a central instrument of strategy, coercion, and disruption. So when an FBI alert describes an offshore drone threat to California, it is drawing on a weapon class Iran has already used heavily in this war and on a maritime-launch concept Iran has already showcased.

ABC’s report adds another layer that should get attention. It says U.S. intelligence officials have also been increasingly concerned in recent months about the expanding use of drones by Mexican drug cartels and about the possibility that such technology could be used against American personnel near the southern border. ABC further reported that intelligence officials have long worried about equipment being pre-positioned on land or ships in the event Israel or the U.S. struck Iran. Former DHS intelligence official John Cohen told ABC he was concerned about the possibility of drone warfare coming from both the Pacific and Mexico. Even if one sets aside his opinion, the underlying message is clear: U.S. authorities are no longer treating cheap, low-altitude unmanned systems as a foreign-battlefield problem only. They are increasingly treating them as a homeland-security problem too.

The hardest part of this story is that the alert names California but not the targets. That leaves a huge defensive puzzle. California has a vast coastline, dense population centers, major infrastructure, ports, and military facilities. The absence of a named target does not make the warning less important; in some ways it makes it more destabilizing, because it forces law enforcement and security agencies to think broadly instead of narrowly. If the scenario is a vessel offshore and unspecified targets inland or along the coast, the problem becomes one of detection and response across a very wide area rather than simple point protection. That is also why the wording “aspired” matters. It suggests intent or conceptual planning rather than a fully operational plot, but when the possible method is a maritime-launched drone strike, even partial intent is enough to trigger serious concern.

There is also a political dimension to this warning. Reuters reported that the broader DHS assessment viewed targeted attacks in the homeland as possible even while judging a large-scale physical attack unlikely. That is the balance officials are trying to strike right now: not telling the public that a mass-casualty Iranian strike on America is around the corner, but also not pretending the retaliation risk is confined to cyberattacks or the Middle East. The California alert pushes that balance further toward physical-security concerns, because it describes a scenario that would blur the line between foreign conflict and domestic vulnerability. It is one thing to tell local police to watch for protests, cyber spillover, or lone actors. It is another to tell them to think about offensive drones coming off a ship in the Pacific.

The cleanest way to understand this story is to separate what is known from what is feared. What is known is that ABC reviewed an FBI alert warning California police that Iran had allegedly aspired to conduct a surprise drone attack from an unidentified vessel off the U.S. coast against unspecified California targets if the U.S. attacked Iran. What is also known is that the bulletin said there was no further information on timing, method, target, or perpetrators, and that broader federal assessments have already warned of possible Iran-related retaliation inside the United States. What remains unknown is whether the idea ever advanced beyond aspiration, whether any vessel was positioned, whether any operational planning matured, and whether the danger is rising or receding right now. But in homeland security, warnings like this matter long before every gap is filled in. The real significance is not that officials have publicly proven a drone strike is coming. It is that they believed the possibility was serious enough to tell California police to start thinking about it.