U.S. officials suspect Iranian hackers are behind a series of cyber intrusions targeting fuel monitoring systems at gas stations across multiple U.S. states.

Axar.az reports, citing CNN, the breaches involved automatic tank gauge (ATG) systems used to track fuel levels in storage tanks.

In some cases, the systems were left exposed online without password protection, allowing hackers to access dashboards and manipulate display readings, though not the actual fuel levels, the sources said.

While no physical damage or fuel loss has been confirmed, officials and cybersecurity experts warned the activity could have posed serious safety risks if attackers had altered readings in ways that obscured real leaks or system failures.

U.S. authorities have not publicly attributed the campaign, but sources said Iran is a leading suspect due to its prior history of targeting similar industrial control systems.

The FBI and the Cybersecurity and Infrastructure Security Agency did not immediately comment on the investigation.