6 Dead in Amtrak train derailment in Pierce County, Washington

Cars from an Amtrak train that derailed above lay spilled onto Interstate 5 alongside smashed vehicles Monday, Dec. 18, 2017, in DuPont, Wash. The Amtrak train making the first-ever run along a faster new route hurtled off the overpass Monday near Tacoma and spilled some of its cars onto the highway below, killing some people, authorities said. (AP Photo/Elaine Thompson)

UPDATE: The AP is reporting the Amtrak train was making its first-ever run along a faster, new route when it hurtled off an overpass south of Seattle at an estimated 80 mph, spilling some of its cars onto the highway below, killing at least six people and crushing two vehicles.

Seventy-seven passengers and seven crew members were aboard when the train derailed, authorities reported. At least 50 people were hospitalized, more than a dozen with critical or serious injuries, authorities added. No one on the highway was killed, AP reported

(KUTV) -- An Amtrak train derailed and fell off an overpass onto the freeway in Pierce County, Washington.

Watch the situation live: KOMO LIVE Broadcast.

All southbound lanes of Interstate 5 were closed Monday morning after an Amtrak train derailed and fell off an overpass onto the freeway.

Some injuries were initially reported, but the reports of casualties began to surface.

"I was just shocked," said Peter Zimmerman of Olympia. "I couldn't believe it. It was like something out of a movie."

Several vehicles were struck on I5 by the derailed train cars, injuring multiple motorists. No fatalities of motorists have been reported as of yet.

State transportation officials say the train derailed near Mounts Road.

Amtrak officials say the train was the No. 501, which operates between Seattle and Portland.

The train had just begun using a new high-speed route Monday morning.

Lakewood city officials had earlier expressed fears that the new route would cause serious accidents.

"We have fatalities and casualties," said Detective Ed Troyer of the Pierce County Sheriff's Department. "This is a regional mass casualty response."

Amtrak service south of Seattle is temporarily suspended. Service from Seattle to points north and east is continuing to operate.

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