MOUNTLAKE TERRACE, Wash. — A 20-year-old driver from Edmonds was killed after hitting a mattress on Interstate 5 near Mountlake Terrace Saturday morning, according to the Washington State Patrol.
The deadly crash occurred on the King and Snohomish county line on I-5 near 220th Street around 6:30 a.m.
Troopers say a truck was carrying a mattress that flew out of the back, blocking the road.
A semitruck that was following behind was unable to avoid the car and hit the vehicle, killing the woman inside.
Another car then slammed into the mattress, lost control and went across all lanes of northbound I-5.
All lanes of northbound I-5 were closed at 220th St SW for nearly six hours, before reopening around 12:30 p.m.
Anyone with information on the unknown truck that was carrying the mattress or its occupants is asked to contact the Washington State Patrol at 206-654-1204.