WASHINGTON (AP) — The Supreme Court ruled Monday that police officers have leeway to frisk a passenger in a car stopped for a traffic violation even if nothing indicates the passenger has committed a crime or is about to do so.

The court on Monday unanimously overruled an Arizona appeals court that threw out evidence found during such an encounter.

The case involved a 2002 pat-down search of an Eloy, Ariz., man by an Oro Valley police officer, who found a gun and marijuana.

The justices accepted Arizona's argument that traffic stops are inherently dangerous for police and that pat-downs are permissible when an officer has a reasonable suspicion that the passenger may be armed and dangerous.

The pat-down is allowed if the police "harbor reasonable suspicion that a person subjected to the frisk is armed, and therefore dangerous to the safety of the police and public," Justice Ruth Bader Ginsburg said.

The case is Arizona v. Johnson, 07-1122.