One person was killed, and several others injured when a roller coaster derailed in Stockholm Sunday, Swedish TV reported.

Park officials told public broadcaster SVT that that one of the carriages on the Jetline rollercoaster derailed and people fell to the ground at the Grona Lund amusement park.

“It is incredibly tragic and shocking,” park spokeswoman Annika Troselius told SVT. “Unfortunately, we have been informed that one person is killed, and many are injured.”

Police said seven people, both children and adults, were hospitalized.

The amusement park was evacuated to facilitate the work of rescue crews.

SVT reporter Jenny Lagerstedt, who was standing in line for another ride, said the carriage was at a high altitude.

“Suddenly I heard a metallic thud and then the rides started to shake,” she said. Rescuers had to remove other passengers who were stuck in other carriages on the roller coaster after the accident.

Ambulances, fire trucks and a helicopter were seen arriving at the park, and police said they were investigating.

Grona Lund said in a statement that the 140-year-old park was closed until further notice. A spokesperson could not immediately be reached for comment.

The steel tracked Jetline roller coaster can reach speeds of up to 90 kilometers per hour (56 mph) and stands at a height of 30 meters (98 feet), transporting more than 1 million visitors each year, according to the amusement park website.