Firefighters responded to a 911 call Saturday after the monorail at the Dallas Zoo left passengers stuck when it stopped operating on the tracks, ABC news said.
Due to an unspecified malfunction, the monorail stopped running around 3:30 p.m. on Saturday, leaving 100 people stuck 20 feet off the ground, the Dallas Morning News said.
No one was injured in this event and all passengers were removed from the train using five extension ladders, the Dallas Morning News said. The 30-minute rescue went smoothy because the train did not stop over any animal habitats, making the passengers easily accessible in the rescuing process, Dallas Fire Rescue spokesman Jason Evans said.
The Dallas Zoo's monorail is the only one in the U.S. that is ''engineered to climb and turn, taking guests on a one-mile tour through bush, desert, forest, woodland, river, and mountain environments," the zoo's website says, according to ABC news.