Members of the fire service rescue people from a cable vehicle gondola, in Cologne, Germany, Sunday July 30, 2017.
Dramatic pictures have emerged showing the rescue operation as 75 terrified people, including children, had to be lowered to safety by ropes.
German media reported that rescue teams in Cologne had practised for an incident on the gondola just a week ago.
A large mobile crane has been moved in and firefighters are using it to try to reach the trapped passengers.
Rescue crews are evacuation as many as 100 people that became trapped in cable cars.
Authorities say 32 of the cars were operating on the line, which travels 50ft above the River Rhine, when the crash happened.
No injuries have been reported.
"That will always be in our memory", Mrs Rieger said.
Emergency services from Aachen and Dusseldorf assisted fire crews with the rescue.
The cable cars in Cologne are a popular means of transport, connecting the zoo to the Rheinpark across the river.