FBI Alert Warns of Potential Iranian Drone Attack on California, Officials Stress No Imminent Threat
FBI Warns of Iranian Drone Attack on California, No Imminent Threat

FBI Issues Alert on Potential Iranian Drone Attack Targeting California

The Federal Bureau of Investigation has issued an alert raising concerns about the possibility of an Iranian drone attack targeting the US state of California. However, officials have stressed that the warning is based on unverified intelligence and does not indicate an imminent threat. The memo suggests Iran could attempt to launch unmanned aerial vehicles from a vessel off the US coast as retaliation if the United States conducted military strikes on Iran.

Details of the FBI Memo and Public Response

The disclosure of the alert drew widespread attention earlier this week after reports surfaced that the FBI had warned law enforcement agencies about the potential for a seaborne "surprise attack." According to the memo, the scenario involved drones launched from a ship somewhere off the American coastline. Authorities later clarified that the notice was based on raw intelligence and was circulated out of caution rather than evidence of an immediate danger.

The warning was first reported by ABC News on March 11. The FBI had earlier distributed the memo to members of a Joint Terrorism Task Force last month, before the latest escalation in the Middle East conflict. The United States and Israel began carrying out strikes on Iran on February 28, raising fears of possible retaliation.

The memo states that the agency received intelligence suggesting Iran might consider launching a drone attack from a vessel at sea. It was marked "unclassified" but also labelled as "law enforcement sensitive," with a clear warning that the information was preliminary and not for public dissemination. Officials familiar with the warning have repeatedly said that the information remains unverified.

Authorities Reassure Public Amid Growing Concerns

California authorities have sought to reassure the public that there is currently no confirmed threat. Governor Gavin Newsom said in a post on social media that officials are monitoring the situation closely, stating, "While we are not aware of any imminent threats at this time, we remain prepared for any emergency in our state." A California-based federal law enforcement official told CBS News that the warning was "not actionable," and another official emphasized, "This is unverified. There has been no information given on the timing, source, method or target of any such attack... since then, we have seen no further indications of this."

Why Drone Attacks Are Seen as a Plausible Threat

Even though the FBI alert may not point to a credible attack plan, experts say the scenario described is technically feasible. Long-range one-way attack drones, often called "kamikaze drones," have become a major feature of modern warfare. These systems are designed to fly long distances before crashing into a target and detonating their payload, and they can travel hundreds or even thousands of miles at relatively low cost compared to traditional cruise missiles.

Iran and its regional allies have emerged as major developers and users of such systems. Iranian drone designs, like the Shahed-136, have been widely used in recent conflicts, including the war between Russia and Ukraine. The Shahed-136 is a one-way attack drone capable of flying long distances and striking targets, with variations influencing the development of similar systems elsewhere, including the US Low‑Cost Uncrewed Combat Attack System.

Launching Drones from Ships and Offshore Attack Risks

Another factor raising concern is the flexibility of these drones. Unlike traditional missiles, many kamikaze drones can be launched from various locations, including trucks, temporary launch racks, and ships. Iran and the United States have both demonstrated that Shahed-type drones can be launched from vessels at sea, and even smaller commercial vessels could theoretically deploy them, making concealment easier.

For years, the US military has warned about the possibility of attacks launched from ships positioned offshore, involving cruise missiles or drones from cargo vessels. Several countries, including Russia, China, Iran, and the United States, have developed missile launch systems that can be hidden inside standard shipping containers, meaning a seemingly ordinary commercial vessel could carry launch systems capable of striking land targets.

US Military Response and Past Incidents

The threat has influenced US military programs, such as upgrades to radar systems on F-15C Eagle fighters and tasks for F-35A Lightning II jets and upgraded F-16 Viper aircraft for homeland defence missions. However, US officials have acknowledged that counter-drone defenses are still evolving. Charles Costanza, commander of the US Army’s V Corps, said last year, "We’re behind. I’ll just be candid. I think we know we’re behind... We aren’t moving fast enough."

Security agencies have also investigated mysterious drone incidents near US territory, such as in 2019 when US authorities examined whether a Hong Kong-flagged cargo ship might have been linked to drone swarms harassing US Navy ships off Southern California, though the source was never conclusively identified. In 2024, a claim about an Iranian "mothership" launching drones near the US coast was later rejected by the US military.

Conclusion: A Warning Without Confirmed Threat

While the FBI memo has sparked debate, officials emphasize that the information remains unverified and does not indicate any immediate danger. Still, experts say the warning serves as a reminder of the growing role drones could play in future conflicts. Even if this specific intelligence tip turns out to be inaccurate, the possibility of drone attacks launched from offshore platforms remains a real concern for US security agencies. As drone technology becomes cheaper, more capable, and widely available, the challenge of defending against such threats is expected to become increasingly complex.