Four dead and at least 52 injured after amphibious Duck tour vehicle collides with bus full of students in Seattle

Scene: There was a chaotic scene on the Aurora Bridge today as emergency services treated those on board the two buses and took them to hospital. Four people died and 12 were critically injured in the deadly collision

At least four people have died and at least 52 people have been injured after a bus carrying college students collided with a Duck Tour vehicle in Seattle, Washington 

A victim from a fatal crash involving the amphibious tour bus and a charter bus is loaded into an ambulance

The charter bus, left, and the amphibious, military-style tour vehicle collided in a deadly crash involving several vehicles Thursday

Personnel remove a victim's body from the scene of a crash between a Ride the Ducks vehicle and a charter bus on Aurora Bridge in Seattle, Washington, on Thursday

Four people were killed and 12 critically injured on Thursday when an amphibious tour bus collided head-on with a charter bus on a Seattle bridge, authorities said. Here one of the bodies is removed from the scene

Firefighters and paramedics tend to people in the triage unit set up on the road after the horrific collision 

An aerial scene shows debris strewn all over the narrow bridge in between the fire engines and ambulances 

Survivors of the crash were escorted away from the accident and off the bridge

An injured person is taken to an ambulance at the scene of a crash between the tour bus and a tourist duck boat

A woman with cuts on her face and her arm in a sling is taken into the back of an ambulance following the collision 

A patient is carried on a stretcher in a neck brace by two medical personnel. A large number of those injured could not speak English 

A medical examiner checks the scene of a crash. Witnesses say the Duck Tour vehicle swerved and slammed into the bus 

An emergency worker walks in front of a charter bus that had its two front windows blown out in the collision 

People with bandaged arms are seen standing beside the charter bus that was involved in the crash 

Two of the victims speak to a member of the emergency services as they evaluate the scene. Most were treated at a triage center set up at the crash site 

Reports suggest tourists were seen crawling out of the wreckage, and a triage center was set up near the scene

A passenger who was on board the Duck bus said the captain was pointing out various sites when the traffic slowed down before the crash 

One witness told told the station he saw the Duck vehicle swerve into the side of the tour bus. He then saw people flying out of the bus into the street

Emergency vehicles surround the site of a deadly crash between the charter bus and the amphibious tour vehicle. Police examine a piece of wreckage at the scene 

The cause of the crash has not yet been confirmed by police. The roads have been closed in both directions

Some witnesses believed the crash could have initially been caused by a tire blowout. But on closer inspection one believed the vehicle may have malfunctioned 

Police cars stationed at one end of the bridge stop traffic from getting any closer. The road was closed in both directions in the aftermath

The Ride the Duck tour vehicles, which are styled on landing crafts used in the Second World War, do not have any seat-belts (file picture)