I am not sure the cause. I was actually on my way to 2 events this evening and left before the battalion chief arrived.
The injuries did not appear to be too bad. Both victims were alert and sitting up on side of the road. One was placed on a backboard before being transported.
I'll get more info this weekend. If I was a betting person, I would say that seatbelts were used.
Westbound Smith Enke was closed by the library and traffic was routed through RED. Eastbound had one lane open as rescue workers tended to the victims and PD investigated the scene.