Updated 11:20 PM ET
ARLINGTON, Texas A woman died Friday in an accident while riding the Texas Giant roller coaster at a Six Flags amusement park.
The accident happened just after 6:30 p.m. Friday at Six Flags Over Texas in Arlington. Park spokeswoman Sharon Parker confirmed that a woman died while riding the coaster at Six Flags Over Texas in Arlington but did not specify how she was killed.
Witnesses told local media outlets that the woman fell from the ride, which is billed as the tallest steel-hybrid roller coaster in the world.
"She goes up like this. Then when it drops to come down, that's when it (the safety bar) released and she just tumbled," said Carmen Brown of Arlington. Brown said she was waiting in line to get on the ride when the accident happened.
As reported by CBS Station KTVT Dallas, Kanisha Howell said she and her daughter were waiting on line to get on the ride and that the roller coaster closed after the accident.
Six Flags expressed sadness over the death and said it was temporarily closing the section of the park around the accident site. It didn't say how long the area would be closed. A message left for Parker by The Associated Press wasn't returned.
"Our thoughts and prayers are with the family and friends during this difficult time," the park's statement said.
The Texas Giant reaches 14 stories high and has a drop of 79 degrees. It can carry up to 24 riders. The ride first opened in 1990 and underwent $10 million in renovations in 2010 before reopening in 2011.
Brown said she was next in line behind the woman and saw her being strapped into her seat next to her son.
"We heard her screaming. We were like, `Did she just fall?"' Brown told The Dallas Morning News.
Arlington police Sgt. Christopher Cook, the department spokesman, referred all questions to Parker. No other details were available.
In 1999, a 28-year-old Arkansas woman drowned and 10 other passengers were injured when a raft-like boat on the Roaring Rapids ride at Six Flags overturned in 2 to 3 feet of water about 200 feet from the end of the ride.