PORTLAND, Ore. (AP) - One motorcyclist died and a second was seriously injured when their bikes collided with a semi-truck in Salem.

The Marion County Sheriff's Office says 41-year-old Cristen Odell of Gervais died at the scene of Wednesday's crash and 53-year-old Kevin Murray of Scio was flown to a Corvallis hospital.

The truck driver was not hurt.

Investigators are trying to determine the cause of the crash on Howell Prairie Road.

(Copyright 2008 by The Associated Press.  All Rights Reserved.)