Washington State Patrol is investigating a fatal crash on Highway 195, about 5 miles south of Pullman.
Troopers said the collision happened around 12:45 p.m. and involved a car and a semi.
Officials said one person died and another person was flown to a Spokane hospital with serious injuries.
Troopers said both directions of the highway are blocked. It is unclear when it will reopen. Detours are in place for the time being.
(story: KHQ.com; photo: Washington State Patrol)