Swedish government investigates deadly roller coaster accident.

Swedish government investigators are investigating a roller coaster accident that killed one person and injured nine at the country's oldest amusement park, Gröna Lund. The park has been closed for at least one week after the accident on Sunday, when a roller coaster train partially derailed, sending some passengers plunging to the ground. The Swedish Accident Investigation Authority is investigating the accident on the Jetline roller coaster to improve safety, while police have launched a criminal investigation on possible charges of involuntary manslaughter, causing bodily harm, and danger to others.