A 48-year-old University Place man was killed late Sunday after the truck he was riding in rolled over on state Route 7, according to the Washington State Patrol.
The accident happened about 10:45 p.m. in the northbound lanes near Pilgrim Road, about a mile north of Alder.
Troopers said the 1990 pickup truck was traveling north when the driver, a 25-year-old man from Fort Riley, Kansas, lost control. The truck left the road, hit and guardrail and rolled before landing in the northbound lanes.
The driver was injured and taken to Good Samaritan Hospital. The passenger, who was identified as Paul Caffarel, was not wearing a seat belt and was killed in the crash.
Drugs or alcohol are believed to be the cause of the crash. The driver was arrested on suspicion of vehicular homicide.
SR 7 was closed for about four hours while the WSP investigated the incident.