GLENDALE, Ariz. - A motorcyclist has life-threatening injuries after a crash at Union Hills Drive and 51st Avenue Wednesday night, according to police.

Police said the motorcyclist was traveling southbound on 51st Avenue and made a right turn onto Union Hills Drive. The motorcycle then crashed into an SUV traveling westbound on Union Hills Drive.

The woman driving the SUV stayed on scene, according to police.

It is unknown at this time whether DUI or speed are a factor.

The intersection was shut down in all directions for a few hours after the crash.