Tokyo Dome Corp. was searched Tuesday by police over a fatal accident Sunday in which a 34-year-old man fell to his death from an amusement park ride.

Fumiaki Kuranouchi was on the Spinning Coaster Maihime, a roller coaster with revolving cars, at the Tokyo Dome City Attractions in Bunkyo Ward when he fell from a height of 7 to 8 meters at around 12:40 p.m. Sunday. The ride reaches a speed of 39.6 kph along a 305-meter-long track.

Investigative sources said the amusement park operator is suspected of professional negligence resulting in the man's death after police found safety flaws in the ride's operating manual.