Iran May Activate Sleeper Cells Abroad, U.S. Intercepts Encrypted Transmission

U.S. authorities intercepted encrypted communications that ABC News and multiple outlets say are believed to have originated in Iran.

“Iran may be activating sleeper cells outside the country, alert says The encrypted transmission was intercepted by the U”

ABC News

Those communications could serve as an "operational trigger" to activate sleeper assets abroad.

ABC News

Reporting describes a federal law-enforcement alert based on preliminary signals analysis that flagged a coded transmission relayed across multiple countries and addressed to clandestine recipients.

The language frames the intercept as potentially intended to instruct covert operatives outside Iran.

Preliminary signals analysis described in the alerts indicates the message was encoded for clandestine recipients who hold the proper key.

The analysis indicates the broadcast used an internationally-rebroadcast relay capable of crossing borders without relying on the internet or cellphone networks.

Anadolu Ajansı

Outlets say such broadcasts match known techniques for instructing or activating prepositioned operatives.

Officials urged increased monitoring as the technical origin and exact content remain undetermined.

Reporting repeatedly ties the timing of the transmission to recent strikes and to claims about Iran’s Supreme Leader, but sources use differing language about that event.

Some outlets say the intercept came "shortly after the reported death" of Ayatollah Khamenei, while others say the message began after strikes that "killed" him or that he "had died," producing an uncertain picture in the accounts.

Officials cited in the alerts have not confirmed a specific link between the broadcast and any proven operation.

U.S. law-enforcement and counterintelligence authorities have been urged to increase monitoring and situational awareness while officials and allied partners closely watch developments.

Reporting notes the alert explicitly says the content cannot yet be determined and that no specific operational threat has been identified, even as agencies work with international partners to address the potential risk and police were advised to watch for suspicious radio traffic.

News18

Reports place the intercept amid wider regional escalation, with some outlets linking it to a series of U.S. and Israeli strikes and noting Tehran’s public warnings and threats, including comments about oil prices and pressure on governments.

“US Intercepts Iranian Signal That May Activate 'Sleeper Cells' After Khamenei's Death: Report A US alert cited a "preliminary signals analysis" of a transmission of "likely Iranian origin" that was relayed to several countries shortly after Khamenei's death”

News18

Those context details show authorities view the intercept as part of a larger, tense picture, but the reporting also stresses that the message’s contents and any concrete operational plan remain unverified.

The Jerusalem Post