Did Iran hack water systems in seven US states? - BBC News

While US President Donald Trump has said Iran is not to blame, cyber experts tell the BBC it likely the attack was at the hands of the Iran.

Image source, Getty ImagesByAna FaguyPublished4 August 2026, 03:29 BSTMany were surprised last week when the US state of Minnesota reported that more than 30 of its state water systems had faced a "co-ordinated cyber-attack".

Days later the FBI warned cyber-attacks had been reported in seven states and "some of that activity degraded water operations".

The US Cybersecurity and Infrastructure Security Agency (Cisa) is reportedly probing a possible Iranian connection to the Minnesota attacks, according to US media. Cisa would not comment.

Although US President Donald Trump has not blamed Iran, cyber-experts tell the BBC it's likely the attack was directed by Tehran.

Here's what you need to know.