WATCH: Roller coaster rescue in Oklahoma City

OKLAHOMA CITY (AP) -- Oklahoma City firefighters are escorting eight people -- including seven children -- from a roller coaster that became stuck.

District Chief Benny Fulkerson said there are no injuries and firefighters were walking the stranded riders down a catwalk to safety after the amusement park ride became stuck.

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He said the children range in age from 7 to 15.

Fulkerson says the Silver Bullet roller coaster at Frontier City "just didn't make it over a hill" and became stuck.

Fulkerson says power to the ride was shut off and the cars were chained to the rail before the stranded riders were escorted down one at a time.