Washington State Patrol confirms an I-5 bridge over the Skagit River has collapsed and at least two cars with people inside are in the water.
The incident happened around 7 p.m. Details were few, but first responders were en route to the scene.
The incident has closed all northbound and southbound lanes on I-5, and traffic is significantly backed up.
KING 5 News crews are en route. More to follow.