Authorities say a roller coaster carrying 24 people has become stuck near the top of the ride and fire officials are trying to rescue them at Six Flags America in Maryland.
Prince George's County Fire officials were called to The Joker's Jinx roller coaster at the park just before 2:30 p.m. Sunday. No injuries have been reported.
Assistant Fire Chief Paul Gomez says the riders are sitting upright near the top of the ride. He says it will likely take a few hours to get them down.
It's not clear what caused the ride to get stuck. Telephone and email messages left for a Six Flags spokeswoman were not immediately returned.
Six Flags' website says the ride goes more than 96 kilometres per hour and turns upside down four times.
