Swedish government investigators launch probe of deadly roller coaster accident

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Aerial picture of rollercoaster Jetline at amusement park Gröna Lund in Stockholm, Sweden, Monday June 26, 2023. Swedish government investigators on Monday launched a probe into a roller coaster accident that killed one person and injured nine at the country’s oldest amusement park. The Gröna Lund park has been closed, and will remain closed for at least one week after the accident Sunday June 25, 2023, when a roller coaster train partially derailed, sending some passengers plunging to the ground. (Marko Saavala/TT News Agency via AP)

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Rollercoaster Jetline is seen at amusement park Gröna Lund in Stockholm, Sweden, Monday June 26, 2023. Swedish government investigators on Monday launched a probe into a roller coaster accident that killed one person and injured nine at the country’s oldest amusement park. The Gröna Lund park has been closed, and will remain closed for at least one week after the accident Sunday June 25, 2023, when a roller coaster train partially derailed, sending some passengers plunging to the ground. (Marko Saavala/TT News Agency via AP)

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Aerial picture of amusement park Gröna Lund in Stockholm, Sweden, Monday June 26, 2023. Swedish government investigators on Monday launched a probe into a roller coaster accident that killed one person and injured nine at the country’s oldest amusement park. The Gröna Lund park has been closed, and will remain closed for at least one week after the accident Sunday June 25, 2023, when a roller coaster train partially derailed, sending some passengers plunging to the ground. (Marko Saavala/TT News Agency via AP)

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Police cordon off the Gröna Lund amusement park in Stockholm, Sunday, June 25, 2023. According to reports an accident occurred on a rollercoaster leaving one person dead. The amusement park was being evacuated and the police have set up cordons. (Claudio Bresciani/TT News Agency via AP)

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FILE - A general view of the Jetline rollercoaster in Grona Lund amusement park in Stockholm, Sept. 5, 2009. According to reports an accident occurred on a rollercoaster on Sunday, June 25, 2023 leaving one person dead. (Fredrik Persson/TT News Agency via AP, file)

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STOCKHOLM (AP) — Swedish government investigators on Monday launched a probe into a roller coaster accident that killed one person and injured nine at the country’s oldest amusement park.

The Gröna Lund park was closed for a week after the accident Sunday when a roller coaster train partially derailed and sent some passengers plunging to the ground.

One passenger died and nine were taken to Stockholm area hospitals. Most of the injured, including three children, were released by Monday. Four adults remained hospitalized, two of them in serious but not life-threatening condition, the regional government said.

Park officials said the front of the train derailed for unknown reasons and came to a halt between 6 and 8 meters (between 20 and 25 feet) above ground. Witnesses said two or three people fell out, one of whom managed to cling to the track.

Experts from the Swedish Accident Investigation Authority arrived Monday at Gröna Lund to investigate the accident on the Jetline roller coaster. The government agency is charged with investigating serious accidents with the aim of improving safety, rather than establishing guilt.

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Separately, police launched a criminal investigation on possible charges of involuntary manslaughter, causing bodily harm and danger to others. Prosecutor Christer B. Jarlås, who took over that investigation Monday, said that a number of witnesses and first responders had been interviewed already but added it was too early to determine whether there were grounds for criminal charges.

The 800-meter (2,600-foot) long Jetline rollercoaster opened in 1988 and was renovated in 2000, according to Gröna Lund. It has a maximum height of 30 meters (98 feet) and a top speed of 90 kph (56 mph).

Located on an island near Stockholm’s city center, Gröna Lund opened in 1883 and is one of Sweden’s most popular amusement parks.