A collision involving multiple vehicles blocked all westbound lanes of Interstate 90 on Sunday evening, according to Washington State Department of Transportation cameras from the scene.
At about 7:19 p.m., WSDOT tweeted there was a collision blocking all lanes just east of Sunset Way.
About 10 minutes later, WSDOT confirmed the collision involved multiple vehicles and there was a large law enforcement presence at the scene.
Eastside Fire and Rescue would later confirm there were five vehicles involved, with at least one extrication.
Two patients were being transported to a hospital.
Washington State trooper Rick Johnson said there were four cars involved. A vehicle traveling eastbound was struck and crossed into the westbound lanes, hitting another vehicle. The eastbound driver was in custody for suspected impairment. The causing driver has not been determined yet.