Federal authorities warned California law enforcement in late February that Iran had allegedly considered a surprise drone attack against unspecified targets in the state if the United States struck Iran, according to a bulletin reviewed by multiple news organizations.
The warning drew wide attention on March 11 because it surfaced publicly as the war involving the United States, Israel and Iran entered its 12th day. But the newly public bulletin came with major limits. It described an alleged aspiration, not a charged plot, and said officials had no added information about timing, targets, methods or perpetrators. California officials, Los Angeles officials and law enforcement sources interviewed by national and local outlets all said they were not aware of any imminent or specific credible threat, even as they kept an elevated security posture and reviewed the scenario seriously.
The timeline began before the current round of fighting. ABC News reported that an FBI alert distributed at the end of February said authorities had “recently acquired information” that, as of early February 2026, Iran allegedly aspired to launch unmanned aerial vehicles from an unidentified vessel off the U.S. coast against unspecified targets in California if the United States attacked Iran. Reuters later reviewed an unclassified copy of the bulletin and said it had been issued through the Los Angeles Joint Regional Intelligence Center, a multi-agency hub that shares security information with law enforcement. The wording mattered because it showed the scenario was being considered before the U.S. and Israeli bombardment of Iran began on Feb. 28. Once the conflict widened, the old bulletin took on new weight. By Wednesday, the document had become public, turning what had been a limited law enforcement warning into a national political and homeland security story. Even then, the bulletin itself remained narrow. It said only that Iran had allegedly aspired to the attack and that officials had no additional details.
Officials responded with a mix of caution and restraint. The FBI office in Los Angeles declined public comment to ABC News and NBC Los Angeles. Gov. Gavin Newsom said California had been in constant coordination with security and intelligence officials and that the state had already elevated its posture because of the conflict in the Middle East. “While we are not aware of any imminent threats at this time, we remain prepared for any emergency in our state,” Newsom said in a statement reported by Reuters. Los Angeles Mayor Karen Bass said there was no specific or credible threat to the city, while the Los Angeles County Sheriff’s Department said it remained at an elevated level of readiness because of current global events. The Los Angeles Police Department said it was in constant contact with local and federal partners and was sharing information in real time. NBC Los Angeles, citing five law enforcement sources familiar with the reporting, went further and said there were no specific threats of Iranian drone attacks being planned against California on Wednesday. Those sources said agencies were examining many possible terrorism scenarios and that bulletins of this kind can contain raw information that has not yet been fully vetted.
The broader context explains why the bulletin was taken seriously even without specific details. Reuters reported that the warning surfaced as the war reached its 12th day after the Feb. 28 airstrikes on Iran. ABC News separately reported on March 1 that a Department of Homeland Security bulletin warned of potential lone-wolf and cyberattacks tied to the conflict. That DHS assessment said a large-scale physical attack in the United States was unlikely, but that Iran and its proxies probably posed a persistent threat of targeted attacks and would almost certainly escalate retaliatory actions or calls to action if reports of the Iranian supreme leader’s death were confirmed. The DHS bulletin also said officials were especially concerned in the short term about low-level cyberattacks by Iran-aligned hackers. That helps place the California drone scenario in a larger federal picture. It was not the only threat model under review. It was one possible form of retaliation among several that homeland security officials were discussing as the war widened and as U.S. officials assessed how Iran, its proxies or inspired actors might respond inside or near the United States.
What remains unknown is as important as what is public. No agency has publicly identified a target, vessel, suspected cell or operational timeline connected to the California scenario. No arrest, indictment or public disruption of an active plot had been announced as of Wednesday evening. ABC News reported that a senior law enforcement official believed the 12-day bombardment had severely degraded Iran’s ability to carry out such an attack. NBC Los Angeles reported that many possible methods, including improvised explosive devices, drones and other technologies, were being examined in recent days as agencies sorted through incoming intelligence. That leaves the case in a familiar homeland security posture: strong enough to trigger warning bulletins and visible coordination, but too thin for officials to describe a confirmed operation. The next steps are likely to stay mostly out of public view unless agencies issue a formal nationwide advisory, release a new state or local bulletin, or disclose a specific investigation. For now, the public record shows vigilance, not a public criminal case or a publicly described interdiction.
The political and practical reactions on the ground reflected that tension. Newsom said the state had active work groups focused on drone threats and that the Governor’s Office of Emergency Services was working with local, state and federal partners to protect communities. In Los Angeles, police and sheriff’s officials used nearly identical language about increased vigilance and intelligence sharing. In San Francisco, local officials also said they were in contact with state and federal partners and had not been told of an imminent threat. President Donald Trump, speaking before ABC News first reported the bulletin, dismissed concern about possible Iran-backed attacks on U.S. soil and said he was not worried. That contrast captured the mood of the day. Intelligence and law enforcement agencies were treating the scenario as serious enough to distribute, discuss and monitor, while elected leaders were trying to reassure the public that no immediate threat had been identified. The result was a story driven less by visible police action than by the release of an internal warning document and the official balancing act that followed it.
For California residents, the public picture Wednesday was one of quiet preparedness rather than emergency orders. There were no evacuation notices, no named targets and no public instruction that pointed to a specific location or window of danger. Instead, there were statements from police departments, the governor’s office and city leaders describing coordination, monitoring and readiness. That kind of language can sound vague, but it is common when agencies want to acknowledge a threat scenario without overstating intelligence they do not yet have. The released bulletin did not describe a confirmed attack plan. It described a possible retaliatory concept tied to a wider war and an already heightened domestic threat environment. That distinction may not satisfy every anxious reader, but it is central to understanding the story. The most significant fact is not that an attack was underway. It is that federal officials considered the possibility serious enough to warn California law enforcement before the conflict escalated, and that state and local agencies are now working from the premise that even uncorroborated warnings require attention.
As of Wednesday night, the status remained unchanged in public. The FBI bulletin had raised concern about a possible Iranian drone retaliation scenario, but California officials and law enforcement sources said they had no imminent or specific credible threat. The next milestone will be any updated federal advisory or public disclosure that either sharpens the warning or rules it out more firmly.
Author note: Last updated March 11, 2026.