Investigators believe a cyberattack this week on dozens of municipal water systems in Minnesota was probably the work of Iranian hackers, according to U.S. and state officials and others familiar with the matter, a potential act of aggression that comes at a precarious moment in the U.S. war against Iran.
Officials cautioned that they had not definitively determined who was responsible for the attack and that the preliminary assessment could change as the authorities collected more technical data.
They also warned that the hackers could be attempting to pose as Iran-based in an effort to ratchet up tensions between the two countries, though former intelligence officials said such a scenario was unlikely.
Local officials reported that the well and treatment plant in at least one city was temporarily offline on Monday, while other cities in the state had to use manual workarounds to cope with attempted attacks on automated operations.
New: Investigators believe a cyberattack this week on dozens of municipal water systems in Minnesota was probably the work of Iranian hackers, a potential act of aggression that comes at a precarious moment in the U.S. war against Iran. https://t.co/Huut3WBM34
— Dustin Volz (@dnvolz) July 30, 2026
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