The U.S. government has intercepted encrypted communications that may serve as an operational trigger for sleeper cells outside Iran, according to a federal alert sent to law enforcement agencies.
The alert, reviewed by ABC News, cites preliminary signals analysis of a transmission described as likely of Iranian origin. The transmission was relayed across multiple countries shortly after the death of Ayatollah Ali Khamenei, Iran's supreme leader, who was killed in a U.S.-Israeli attack on Feb. 28.
The alert does not specify which countries may be targeted or provide details on the specific nature of the communications. Intelligence officials have characterized the findings as preliminary, and the threat assessment remains ongoing.
What the Left Is Saying
Democratic lawmakers and national security analysts have emphasized the need for cautious verification of intelligence before taking additional action. Representative Jason Crow, a member of the House Intelligence Committee, said the preliminary nature of the signals analysis warrants continued monitoring but called for additional intelligence gathering before drawing conclusions.
The Center for American Progress, a progressive think tank, noted that the potential activation of sleeper cells represents a serious concern but stressed the importance of distinguishing between intercepted communications and confirmed operational planning. "We need to let intelligence professionals do their work while ensuring any response is proportionate and based on verified intelligence," the organization said in a statement.
Progressive foreign policy advocates have also raised questions about the broader regional implications of the Feb. 28 attack that killed Khamenei, with some calling for diplomatic de-escalation to prevent further cycles of violence.
What the Right Is Saying
Conservative lawmakers and defense hawks have seized on the alert as evidence of Iran's continuing threat to U.S. interests and allies. Senator Tom Cotton called the communications intercept "further proof that Iran remains the foremost state sponsor of terrorism and cannot be allowed to operate freely anywhere in the world."
The Heritage Foundation said the preliminary intelligence aligns with long-standing concerns about Iran's network of proxies and covert assets. "This is exactly what we've warned about — Iran uses these kinds of dormant networks to project power without direct attribution," the think tank said in an analysis.
House Foreign Affairs Committee Chairman Michael McCaul called for immediate briefing of allied nations and said the administration should consider additional sanctions and intelligence-sharing with partners in the Middle East and Europe. "We cannot afford to wait for these sleeper cells to activate," McCaul said.
What the Numbers Show
The alert references encrypted communications intercepted by U.S. intelligence agencies. The transmission was relayed across multiple countries, a pattern consistent with operational communications meant to avoid detection.
Ayatollah Ali Khamenei was killed on Feb. 28 in what was described as a U.S.-Israeli military operation. This marks the first time a sitting Iranian supreme leader has been killed in such an attack, representing a significant escalation in the ongoing tensions between Iran and the U.S.-Israeli alliance.
The alert characterizes its findings as based on "preliminary signals analysis," indicating that further verification is needed. Intelligence officials have not publicly disclosed the number of countries across which the transmission was relayed or identified specific targets.
The Bottom Line
The federal alert describes intercepted communications that may represent an operational trigger for Iranian sleeper cells, but intelligence officials characterize the findings as preliminary. The intercepted transmission occurred shortly after the death of Iran's supreme leader in a U.S.-Israeli attack on Feb. 28.
The alert does not confirm that any sleeper cells have been activated or identify specific targets. U.S. intelligence agencies continue to analyze the communications, and law enforcement agencies have been placed on heightened awareness. The situation remains under active investigation, and further developments are expected as analysis continues.
Allies in the region have been notified of the potential threat, and intelligence-sharing is ongoing. The incident underscores the continuing tensions in the Middle East following the death of Iran's supreme leader and raises questions about potential retaliation or escalation.