UPDATE: 4 Dead, 12 Critical In Amphibious 'Duck Ride' Collision With Bus

At least four people were killed and 12 critically injured when two vehicles — a charter bus and a tourist ”Ride the Ducks” vehicle — crashed Thursday on Seattle’s Aurora Bridge, officials said. Twenty non-life threatening injuries were also reported.

The Seattle Fire Department tweeted that all passengers have been removed from the scene of the crash. At least 50 people have been examined.

The charter bus was carrying 45 staff and international exchange students from North Seattle College, according to a statement from the college.

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Medics set up a treatment area on the bridge, and at least 10 people have been taken to Harborview Medical Center in Seattle, reported the Seattle Times.

“The Duck boat was 100 yards in front of me, the first car in front of me,” Jesse Christensen, 32, told the Seattle Times. “What I saw was the Duck Boat had its blinker on, trying to get in the left lane. Then all of a sudden the Duck boat turned sharper into the left. I initially thought it was a blow out. The duck boat then hit another car with a roof rack then went head on into the oncoming tour bus.”

Ride the Ducks has provided amphibious tours of Seattle since 1997, according to the company website. The company gets its name from the modified DUKW vehicles — an amphibious landing craft from World War II — it uses for tours. The company is independently owned and operated and employs more than 120 people.

Aurora Bridge has been closed for all pedestrian and vehicle traffic.

This is a breaking news story. Refresh this page for more details as they become available.

Photo courtesy of Seattle Fire Department