TikTok videos show the aftermath of a deadly roller coaster derailment in Sweden

• A roller coaster derailed in Sweden on Sunday, killing one and injuring nine others.

• Chaotic videos show medical crews rushing to the scene in the aftermath of the derailment.

• Swedish police have opened an investigation into the accident, according to reports.

Idyllic scenes turned chaotic at an amusement park in Stockholm, Sweden on Sunday after a roller coaster partially derailed, injuring nine people and killing one.

At a press conference, Grona Lund amusement park officials said there had been a "very serious accident" with the park's Jetline roller coaster, Reuters reported.

"Today is a day of mourning at Grona Lund," Jan Eriksson, Grona Lund's chief executive, said at the press conference.

Swedish Police have launched an investigation into the derailment, according to Reuters.

Grona Lund describes the Jetline as an "action-packed," classic, steel-track roller coaster on its website. According to the company, the roller coaster is 30 meters tall and can travel at speeds of up to 55 miles per hour.

TikTok videos captured the derailment's chaotic aftermath. One video shows a medical crew rushing an orange stretcher through the park while park employees hold back large groups of people.

A second video appears to show a man wearing a red shirt hanging onto the side of the roller coaster. Rescue crews can be seen on a platform to his right.

While roller coaster derailments do happen, they are rare, according to the International Association of Amusement Parks and Attractions. According to the association, the odds of being seriously injured while on an amusement park ride in the United States, for example, are 1 in 15.5 million rides taken.

Grona Lund did not immediately return Insider's request for comment on Sunday. Zierer, the company that manufactures the Jetline roller coaster, also did not return Insider's request for comment on Sunday.

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