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Driver killed after hitting mattress on I-5 near Mountlake Terrace

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.

Another car then slammed into the mattress, lost control and went across all lanes of northbound I-5.

A semitruck that was following behind was unable to avoid the car and hit the vehicle, killing the woman inside.

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.