What started as a Tukwila police chase on northbound Interstate 5, ended in a rollover crash just north of Southcenter.
Several occupants of the car jumped out and ran down the freeway, eventually running into the tall brush on the side of the roadway.
Two NB lanes remain closed at State Route 599 as police continue to search the area.
The incident snarled I-5 traffic. At one point all southbound lanes and three northbound lanes were closed to traffic.