President Donald Trump has blamed Minnesota Governor Tim Walz for cyberattacks on the state’s water systems, despite officials reportedly believing Iran is the likelier source. The comments matter because the attacks target essential public infrastructure and appear to be spreading beyond Minnesota.

The FBI recently warned that attacks on US infrastructure were reaching other states, while at least 30 Minnesota community water systems were targeted in an apparently coordinated campaign. The FBI, EPA and CISA have not formally attributed the attacks, but CISA linked similar earlier incidents to Iran; Trump offered no evidence for dismissing Iranian involvement or blaming Walz.