Two people seriously injured in chain-reaction crash

SCOTTSDALE, Ariz. (KSAZ) - Two people suffered serious injures after a chain-reaction collision involving an ambulance on Sunday night.

Scottsdale police say the crash happened near Hayden and Cactus when one vehicle failed to stop for a traffic light and hit another car. These two vehicles then hit an SUV and an ambulance.

Five people were injured, with two suffering serious, but non-life threatening injuries.

Police believe the driver of the vehicle that started the chain-reaction crash may have been impaired.