Malicious cyber activity affected technology at water systems in at least seven states this week, including Minnesota, leading authorities to dig into whether Iranian actors are behind the attack, CBS News has learned.

Hackers have targeted water systems in several US states in a coordinated cyberattack that has caused some utilities to issue boil-water notices and switch to manual mode, taking their systems offline...

“Trump knows exactly who is responsible for this attack, and knows that other states were hit too,” Mr. Walz said on social media, adding, “This is what modern warfare looks like, and it further illus...