MOUNT VERNON, Wash. (CBS NEWS) MOUNT VERNON, Wash. (AP) - The Washington State Patrol chief says the Interstate 5 bridge collapse into the Skagit (SKA'-jiht) River at Mount Vernon was caused by an oversize truck.
Chief John Batiste (buh-TEEST') told an overnight news conference that the truck hit an overhead span. The truck made it off the bridge and the driver remained at the scene and cooperated with investigators.
Two other vehicles went into the water Thursday evening as the bridge collapsed. Three people were rescued and are recovering.
Officials said drivers should expect delays at the break in the major north-south highway about 60 miles north of Seattle. Detours have been set up to try to ease the congestion.