The U.S. has reportedly intercepted an alert believed to have come from Iran that may have been intended to activate "sleeper assets" outside of the country. The alert was sent to multiple law enforcement agencies and was reviewed by ABC News. The signal was reportedly intended to be accessed by "covert operatives or sleeper assets" without relying on internet or cellular networks. The exact contents of the alert are unclear, with no specific threat tied to a specific location. The warning was accompanied by a general warning to increase reviews of suspicious radio-frequency activity. No confirmation has been made regarding the alleged attacks on Iran or the alleged sleeper agents involved in these incidents.