Investigation launched into fatal roller coaster incident in Sweden.

Swedish government investigators and police have launched probes into a roller coaster accident at the country's oldest amusement park, Gröna Lund, that killed one person and injured nine. The park has been closed for at least a week after a roller coaster train partially derailed, sending some passengers plunging to the ground. The cause of the accident is unknown, and experts from the Swedish Accident Investigation Authority are investigating. The Jetline roller coaster opened in 1988 and was renovated in 2000.