About 100 people have been rescued without injury by firefighters after a monorail at the Dallas Zoo stopped operating.
Dallas Fire Rescue spokesman Jason Evans says as many as five extension ladders at a time were used to remove the passengers Saturday.
Local television stations reported the train was between 15 and 20 feet off the ground when it stopped.
Evans says firefighters responded to a 911 call about 3:30 p.m. after an unspecified malfunction caused the train to stop moving.
He says the 30-minute rescue was made easier because firefighters had easy access to the passengers.
The zoo's website says the monorail is the only one in the U.S. that can "climb and turn, taking guests on a one-mile tour through bush, desert, forest, woodland, river and mountain environments."
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