CLE ELUM, Wash. (AP) -- The Washington State Patrol is searching for witnesses to Saturday's fatal bus crash on Interstate 90 near Cle Elum.
Two bus passengers from Pasco died in the accident.
The Tri-City Herald reports the cause of the crash remains under investigation.
The State Patrol says the tour bus was going eastbound on Interstate 90 at about 6:25 p.m., when the driver made a lane change that forced a car off the left side of the road. The car rolled and came to rest on the median. Then the bus swerved right and hit a pickup. The truck came to rest on the shoulder.
The bus rolled after it hit the truck and came to rest on its side on I-90.
Information from: Tri-City Herald, http://www.tri-cityherald.com