PHOENIX -- Phoenix police are investigating a serious collision that sent two people to the hospital with serious injuries.
The incident happened near Central Avenue and Watkins Road before 9 a.m. Sunday.
Witnesses told police it appeared two cars were racing on Central Avenue.
One of the cars hit a tree.
Two people inside the car were taken to the hospital with serious injuries.
The second car remained on scene.
Police are investigating whether impairment was a factor.