Bridge collapse in Washington state

Officials scrambled to rescue drivers after a portion of a four-lane Interstate 5 bridge collapsed into the Skagit River in Washington State on Thursday evening. Miraculously, it appears no one was killed. Authorities suspect a semi truck carrying an oversize load hit an upper part of the span, causing the collapse.

Bridge collapse injures 3

A Washington state bridge collapses, dumping 2 vehicles into the water north of Seattle

In this photo provided by Francisco Rodriguez, the scene were the Interstate 5 bridge collapsed into the Skagit River is seen at dusk Thursday, May 23, 2013, in Mount Vernon, Wash. (AP Photo/Francisco Rodriguez)

In this photo provided by Francisco Rodriguez, a rescue boat approaches the scene where a pickup truck and a car fell into the Skagit River after the collapse of the Interstate 5 bridgeThursday, May 23, 2013, in Mount Vernon, Wash. (AP Photo/Francisco Rodriguez)

In this photo provided by Francisco Rodriguez, a man is seen sitting atop a car that fell into the Skagit River after the collapse of the Interstate 5 bridge there minutes earlier Thursday, May 23, 2013, in Mount Vernon, Wash. (AP Photo/Francisco Rodriguez)

In this photo provided by Francisco Rodriguez, a man is seen sitting atop a car that fell into the Skagit River after the collapse of the Interstate 5 bridge there minutes earlier Thursday, May 23, 2013, in Mount Vernon, Wash. (AP Photo/Francisco Rodriguez)

In this photo provided by Francisco Rodriguez, rescue workers form a human chain as they begin to remove a woman who reaches out from a smashed pickup truck that fell into the Skagit River after the collapse of the Interstate 5 bridgeThursday, May 23, 2013, in Mount Vernon, Wash. (AP Photo/Francisco Rodriguez)

Rescue workers look over the edge where a portion of the Interstate 5 bridge collapsed into the Skagit River in Mount Vernon, Wash., Thursday, May 23, 2013. (AP Photo/Joe Nicholson)

Officials look on from the remaining structure at the collapsed Interstate-5 bridge submerged below in the Skagit River in Mount Vernon, Wash., Thursday, May 23, 2013. At least two vehicles went into the river. (AP Photo/Elaine Thompson)

Department Of Transportation`s Reaction To Bridge Collapse

View looking west at a portion of the Interstate-5 bridge submerged after collapsing into the Skagit river dumping vehicles and people into the water in Mount Vernon, Wash., Thursday, May 23, 2013 according to the Washington State Patrol. (AP Photo/Joe Nicholson)

A rescue boat and divers search near a portion of the Interstate-5 bridge that is submerged after it collapsed into the Skagit river dumping vehicles and people into the water in Mount Vernon, Wash., Thursday, May 23, 2013 according to the Washington State Patrol. (AP Photo/Joe Nicholson)

Map locates I-5 bridge collapse over Skagit River in Mount Vernon, Wash.

A portion of the Interstate-5 bridge is submerged after it collapsed into the Skagit river dumping vehicles and people into the water in Mount Vernon, Wash., Thursday, May 23, 2013 according to the Washington State Patrol. (AP Photo/Joe Nicholson)