The US state of Minnesota last week reported that more than 30 of its state water systems had been subjected to a "coordinated cyberattack." Days later, the Federal Bureau of Investigation (FBI) warned that seven states had reported cyberattacks, some of which "degraded water and wastewater operations." The US Cybersecurity and Infrastructure Security Agency (Cisa) is reportedly investigating a possible link between the Minnesota attacks and Iran. Although US President Donald Trump said Iran should not be blamed and instead pointed the finger at Minnesota officials, cyber experts told the BBC that the attack was most likely orchestrated by Tehran. Iran has not yet commented on the incidents, but has repeatedly denied involvement in other cyberattacks in the past.