A cyberattack targeting a U.S. vehicle breathalyzer company has disrupted services nationwide, leaving drivers unable to start their cars.

The incident affected users who rely on breathalyzer ignition interlock devices, which are typically required for individuals with drunk driving convictions. These devices require users to provide a breath sample that registers below a preset blood alcohol limit before the vehicle will start.

The cyberattack appears to have compromised the company's systems, preventing the normal operation of the breathalyzer devices installed in vehicles across the United States. This has left affected drivers stranded and unable to access their vehicles.

Ignition interlock devices are mandated by courts or state motor vehicle departments as a condition for license reinstatement following DUI convictions. The devices are designed to prevent drunk driving by requiring breath tests before vehicle operation.

The scope of the disruption and the number of affected drivers has not been specified. Details about the nature of the cyberattack, when it occurred, or the timeline for restoration of services have not been disclosed.