United States intelligence agencies have reportedly intercepted encrypted communications believed to have originated from Iran, raising concerns about potential retaliation beyond the Middle East.

According to US officials, the transmission may represent an “operational trigger” designed to activate covert operatives or so-called sleeper assets positioned in different parts of the world.

The warning comes as tensions escalate in the ongoing conflict involving United States, Israel and Iran.

Encrypted Transmission Raises Security Concerns

Reports citing US intelligence sources indicate that authorities intercepted a highly encrypted signal believed to have been sent shortly after the reported assassination of Iranian Supreme Leader Ali Khamenei in a joint US-Israeli strike on February 28.

The communication was reportedly relayed through multiple countries before reaching its intended recipients. Officials believe such transmissions may be used to send instructions to covert networks without relying on internet or mobile communication systems.

The signal was flagged during preliminary analysis by US agencies monitoring unusual radio frequency activity.

Possible Activation of Sleeper Networks

US security officials believe the transmission may have been directed at clandestine operatives who already possess the necessary encryption keys.

Such systems are sometimes used by intelligence services to transmit short coded instructions to sleeper cells or covert agents operating abroad. The message could potentially serve as a trigger signal for these networks.

However, authorities say the exact content of the transmission remains unknown, and further analysis is still underway.

No Specific Threat Identified Yet

Despite the concerns raised by the intercepted communication, US officials emphasised that the alert does not currently indicate an imminent attack or a specific target.

The advisory sent to law enforcement agencies noted that no operational threat has been linked to any particular location or country so far.

Nevertheless, authorities have urged security agencies to increase vigilance and monitor suspicious radio frequency activity that may indicate covert communication.

Heightened Global Security Alert

The alert comes at a time of heightened global tensions following the reported killing of Khamenei and the ongoing confrontation involving Iran and Western powers.

Officials in Washington have previously warned that Tehran or groups aligned with it could attempt retaliation outside the Middle East if the conflict escalates further.

As a result, intelligence and security agencies across several countries are closely monitoring developments.

Disclaimer

This report is based on information from publicly available media sources and statements from officials. Details regarding intelligence assessments and security threats are evolving and may change as further information becomes available.