Federal Way, WA : Two people minor injuries in multi-vehicle crash Interstate 5 on Friday November 6 2015

Two cars racing on Interstate 5 in Federal Way caused a crash that involved several vehicles.
that the hit-and-run crash happened Friday morning. Both racing drivers fled the scene.
State troopers say the crash involved four wrecked vehicles and two victims with minor injuries. Witnesses told troopers that one car had fled the scene and another driver had fled on foot.
A preliminary investigation found that two cars apparently were racing up I-5 when one of them clipped a pickup truck, causing it to spin. The other racing car slammed into it head-on, causing a chain reaction.

Source:
Apparent car race on I-5 causes multi-vehicle crash