GOLDEN, Colo. (CBS4) – All lanes of westbound Interstate 70 were closed at 6th Avenue during the Tuesday afternoon commute after several vehicles were involved in a serious fatal crash in Golden.

The crash brought the evening rush to a standstill. The highway was closed for more than four hours because of the massive scene.

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Copter4 flew over a crash on westbound I-70 near 6th Avenue (credit: CBS)

Copter4 flew over a crash on westbound I-70 near 6th Avenue (credit: CBS)

Police say the area is a particularly dangerous part of the highway and the crash happened when the roadway was at its busiest — at the beginning of the evening commute.

Dark skid marks on the road marked where the violent crash killed a driver and sent another person to the hospital. The chaotic scene was littered with a semi-truck crashed in the median and three cars mangled on the highway, including a black Toyota 4Runner that had its driver’s side completely destroyed.

(credit: CBS)

(credit: CBS)

Mike O’Neil drove up to the scene moments after the crash and saw first responders giving CPR to one of the victims.

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“They did it for quite a while and then they realized it was hopeless,” O’Neil said.

Police have not said who was at fault. State troopers conducted a detailed investigation of the semi.

Copter4 flew over a crash on westbound I-70 near 6th Avenue (credit: CBS)

Copter4 flew over a crash on westbound I-70 near 6th Avenue (credit: CBS)

At this point no arrests have been made.

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The crash was so large a special investigative team was brought in to piece the collision together. Golden police expect to get a moment-by-moment account of what happened.