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.

Michigan is among the states reporting a " coordinated cyberattack " which targeted more than 30 community water systems in Minnesota and potentially several other states on Sunday, July 26 and Monday...

In Minnesota alone, more than 30 water systems have been attacked and a senior law enforcement official told NBC News that the attack bears all the hallmarks of Iranian- backed hackers.