Vehicles strike pedestrians on South Palo Verde Road

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TUCSON, Ariz. -- Two vehicles were going south on Palo Verde Road when the first one struck a female crossing the street at Milton Road.

The second car hit two male pedestrians nearby who may have been helping the woman.

The woman was hospitalized with life threatening injuries, and one of the men was also hospitalized in serious condition.

The other man refused treatment at the scene.

The investigation is ongoing and there's no word yet on the two vehicles involved.