The FBI Cyber Division warned organizations and companies that Iran-affiliated hackers are targeting U.S. critical infrastructures.
The warning comes hours before the 8 PM ET deadline President Donald Trump gave Iran to open the Strait of Hormuz.
“Iran-affiliated cyber actors are targeting operational technology devices across US critical infrastructure, including programmable logic controllers (PLCs),” the division wrote on X. “These attacks have led to diminished PLC functionality, manipulation of display data and, in some cases, operational disruption and financial loss.”
Iran-affiliated cyber actors are targeting operational technology devices across US critical infrastructure, including programmable logic controllers (PLCs). These attacks have led to diminished PLC functionality, manipulation of display data and, in some cases, operational… pic.twitter.com/odBD3lBi0l
— FBI Cyber Division (@FBICyberDiv) April 7, 2026