TOKYO (AP) _ A roller coaster derailed Friday at Tokyo Disneyland, but none of the 12 riders on board were injured, the park's operator said.

The rear car of the 12-car roller coaster popped off the tracks near the end of the popular ``Space Mountain'' ride, said Keiko Namikoshi, a spokeswoman for operator Oriental Land Co., adding that the train came to a halt and all aboard were safely guided out of the cars.

It was the first accident on Space Mountain at Tokyo Disneyland, which opened in 1983, Namikoshi said.

Tokyo Disneyland suspended operation of the ride after a September accident in California on Disneyland's Big Thunder Mountain Railroad roller coaster that killed one person and injured 10 others. Officials then conducted safety checks and confirmed the Tokyo ride was safe to operate.