Security agencies say municipalities should watch out for unusual activity, especially in water and energy sectors

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Top government security agencies issued a warning of Iran-affiliated cyber-attacks on critical infrastructure across the US on Tuesday. In a joint statement, the agencies said municipalities, especially in the water and energy sectors, should be on the lookout for unusual activity.

“Cyberattacks on drinking water and wastewater systems directly threaten public health and community resilience,” Jeffrey Hall, an assistant administrator for enforcement and compliance assurance for the Environmental Protection Agency (EPA), said in a statement. “A single breach can disrupt treatment or introduce contaminants, damage equipment, and erode public trust.”

The notice did not detail whether specific facilities had been targeted or any damage had been sustained. The agencies that issued the joint advisory include the EPA, the FBI, the Cybersecurity and Infrastructure Security Agency, the National Security Agency, the Department of Energy and the US Cyber Command.