More than two dozen riders were rescued Sunday from atop a roller coaster at Six Flags America in Largo, Maryland. Prince George's County Fire Chief Marc Bashoor said the rescue operation went smoothly.

Riders were stranded on a high curve about 75 feet up on the Joker's Jinx about 3 p.m., park officials said. They were pulled off one at a time, the Baltimore Sun reported. Bashoor said a 105-foot tower ladder was brought in to assist, the Washington Post reported.

The ride is named for the Batman villain, the Joker, and opened in 1999. It is 2,700 feet long, 80 feet high and reaches speeds of 60 mph, Six Flaggs says.

Cause of the stoppage was not immediately determined. No injuries were reported. The ride will remain closed until it is determined safe, Six Flaggs said.