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.

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