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Hackers targeted municipal water systems in 7 states this week, FBI says

The FBI said the campaign disabled digital controls and in some cases triggered boil-water notices, with Iranian-affiliated hackers the leading suspect.

  • The FBI warned on Friday that cyberattacks have compromised water utilities across seven states, with more than 30 facilities hit in Minnesota alone. This campaign represents the broadest, most disruptive attack on American industrial control systems to date.
  • A leaked memo obtained by WIRED this week tied the attacks to Iranian-affiliated hackers, confirming an earlier CISA advisory from April. This documentation marks the first official link connecting the Minnesota incidents to a broader industrial control systems campaign.
  • The Cybersecurity and Infrastructure Security Agency stated the attacks disabled digital controls and "resulted in boil-water notices." The FBI and Environmental Protection Agency urged utilities to immediately remove internet-exposed programmable logic controllers and implement allow-lists for authorized devices.
  • President Donald Trump blamed Minnesota Democratic governor Tim Walz's administration for the security failures on Friday. This partisan response recalled his past denials of foreign hacking, even after intelligence agencies attributed other intrusions to foreign actors.
  • Federal agencies including the FBI and Environmental Protection Agency are working with affected utilities to remediate the breaches. These incidents expose the vulnerability of industrial control systems that connect digital software with physical equipment in critical infrastructure.
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At least seven U.S. states have suffered in recent days cyber attacks on their water supply system, in a concatenation of sabotages in which some analysts see Iran’s long hand. President Donald Trump denied Friday the possibility that the Islamic Republic, against which it has been at war for five months, would be behind these events and held democrat Tim Waltz, governor of Minnesota, the first state to report it had been affected. The problem i…

·Madrid, Spain
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Associated Press NewsAssociated Press News
+23 Reposted by 23 other sources
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FBI investigates as Michigan joins Minnesota in reporting cyberattacks on its water systems

Michigan has joined Minnesota in reporting cyberattacks on water systems but an official said all were operating “safely.”

·New York, United States
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NBC News broke the news in New York, United States on Friday, July 31, 2026.
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