"We have temporarily closed the ride, as a precaution, due to what happened in Sweden," said Kentucky Kingdom spokeswoman Carolyn McLean. She said the ride will remain shut down until further notice.

Kentucky Kingdom is one of about a half-dozen amusement parks in America that have the Rainbow ride.

Officials said it appears that a bearing failed, causing the collapse of the ride in Sweden.

McLean said Six Flags mechanics and technicians will inspect the ride thoroughly before any decision is made to restart it. She also said the state Department of Agriculture, which is charged with inspecting amusement-park rides, also will "look it over."

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