A collision involving several vehicles is blocking the left lane of eastbound state Route 410 near Sumner, according to the state Department of Transportation.
The 6:10 p.m. crash occurred at Route 410 and Traffic Avenue.
Washington State Patrol troopers and firefighters are on scene.
Traffic is backed up three miles to state Route 512, WSP reports.
UPDATE: All lanes are clear as of 6:50 p.m.