Iran-Israel10 March, 20261 min read
Iran Sends Encrypted Signal To Activate Sleeper Cells Abroad After Khamenei's Death
This article is an automated aggregation of coverage from news outlets. Our editorials offer in-depth analysis curated by the NewsCord team.
U.S. intercepted encrypted communications believed to be an Iranian operational trigger activating sleeper assets Signal was transmitted internationally shortly after Ali Khamenei's reported death on February 28
Encrypted transmission alert
U.S. intelligence agencies intercepted an encrypted radio transmission shortly after the reported Feb. 28 death of Iran's Supreme Leader Ali Khamenei.
“U.S. intelligence intercepted an encrypted message that appears to be an ‘operational trigger’ instructing covert operatives or ‘sleeper assets’ abroad to activate if a war with the United States and Israel began, ABC News reports. The coded signal was sent after the reported death of Iran’s Supreme Leader Ali Khamenei on Feb. 28, according to a federal alert circulated to law enforcement agencies and cited by ABC. The alert characterized the transmission as holding instructions for covert operatives.”
Federal authorities characterized the transmission as an "operational trigger" potentially intended to activate prepositioned covert operatives or "sleeper assets" abroad.
Multiple outlets reported the alert was circulated to law enforcement and cited ABC News as the source for the intelligence assessment, which described the coded signal as holding instructions for clandestine recipients and timed to follow Khamenei's reported death.
Encrypted radio rebroadcast alert
Reporting indicates the transmission was repeatedly rebroadcast by a newly observed station outside Iran. It possessed international rebroadcast characteristics and appeared aimed at recipients with decryption keys, a technique noted as a way to pass instructions without internet or mobile networks. The bulletin urged heightened monitoring of unusual radio-frequency activity across several countries and emphasized that the messages required decryption keys and were not simple public broadcasts.
Regional strikes and casualties
The alert arrives amid intensified regional fighting and reciprocal strikes. Outlets report Israeli strikes on Iranian and Hezbollah sites, and Iranian missile and drone attacks on Israel and countries hosting U.S. forces, with rising civilian casualties reported. Coverage notes specific casualties in the wider region and official acknowledgements such as the U.S. confirmation of the seventh American soldier’s death and President Trump's public statements about tracking sleeper agents and operations against Iranian capabilities.
“Meanwhile, Israel has struck central Iran and Hezbollah infrastructure in Beirut after attacks on Tehran oil depots, and Iran has launched missile and drone strikes at Israel and countries hosting US forces. Civilian tolls are rising: two foreign nationals (including an Indian) were killed in Saudi Arabia, and Iran’s UN ambassador said at least 1,332 civilians have died and thousands more are wounded.”
U.S. response to broadcasts
U.S. authorities balanced caution with readiness: while counterintelligence experts warned of potential revenge attacks and law enforcement were urged to monitor suspicious broadcasts, the alert repeatedly stated there was no known, location-specific threat or solid proof linking the transmissions to particular plots.
U.S. agencies, including the FBI, mobilized counterterrorism and intelligence teams to increase situational awareness, reflecting a posture of heightened vigilance rather than confirmed imminent danger.
