An Amtrak passenger train derailed onto the I-5 freeway outside of Seattle, the Washington State Department of Transportation (WSDOT) confirmed Monday.
The derailment caused all southbound lanes of Interstate 5 near Mounts Road in Pierce County to be closed, the Washington State Department of Transportation tweeted.
A highway camera showed at least one train car toppled onto the road, causing a traffic jam.
WSDOT tweeted that drivers should expect delays and avoid the area.
It's unclear if there are any injuries or what caused the derailment.Amtrak officials said the train was the No. 501, which operates between Seattle and Portland.
The train had just begun using a new high-speed route Monday morning. Lakewood city oficials had earlier expressed fears that the new route would cause serious accidents.
Amtrak service south of Seattle is temporarily suspended.
Service from Seattle to points north and east is continuing to operate.