US Warns Iran May Activate Sleeper Cells After Khamenei’s Death

American intelligence agencies have reportedly detected encrypted communications believed to originate from Iran, raising concerns that Tehran may be attempting to activate sleeper operatives abroad following the death of Iran’s Supreme Leader Ayatollah Ali Khamenei.

The signals were reportedly intercepted shortly after Khamenei was killed in a joint US–Israeli strike on February 28, an event that significantly escalated tensions across the Middle East.

Encrypted Signals Detected

According to intelligence alerts reviewed by officials, the communications involved encrypted messages transmitted through unusual broadcast channels across multiple countries.

Security analysts noted that the messages appeared to be designed for recipients who already possess a specific decryption key, allowing instructions to be delivered without relying on conventional internet or mobile communication networks.

Such techniques are sometimes used to send coded instructions to operatives without revealing the identities of the senders or recipients.

Authorities described the signals as “likely of Iranian origin”, though investigations are still underway to confirm their purpose and intended recipients.

No Immediate Threat Identified

Despite the concerns raised by the intercepted communications, officials have stated that no immediate threat to specific locations has been identified so far.

However, law enforcement agencies have been advised to remain vigilant and monitor any suspicious activities that could indicate attempts to activate sleeper operatives.

Security agencies are also increasing intelligence coordination with international partners to assess potential risks linked to the transmissions.

Heightened Monitoring After Khamenei’s Death

The reported signals come in the aftermath of the killing of Ayatollah Ali Khamenei, which has dramatically intensified the conflict involving Iran, the United States, and Israel.

The strike that killed the Iranian leader triggered a series of retaliatory military actions and heightened security concerns across several regions.

Authorities believe that the geopolitical shock caused by the event could lead to unconventional responses or covert activities from groups aligned with Iranian interests.

Trump Says US Monitoring Situation

US President Donald Trump stated that American authorities are closely monitoring developments related to the intercepted communications.

He emphasised that intelligence agencies are working to evaluate the potential implications and ensure that any emerging threats are addressed quickly.

The US government has also been coordinating with security agencies and allies to track possible risks linked to international networks.

Global Security Concerns

Experts say the possibility of sleeper operatives being activated is taken seriously by intelligence agencies because such networks can remain inactive for long periods before receiving instructions.

Encrypted broadcast methods make it difficult to trace communications directly to specific individuals or locations.

The developments have added another layer of complexity to the already volatile geopolitical situation following the escalation of the Middle East conflict.

As investigations continue, security agencies around the world are maintaining heightened vigilance while analysing whether the intercepted signals represent a real operational threat or precautionary communication activity.