(CNN) — Before Ohio fairgoers were hurled off the Fire Ball, the ride was inspected multiple times. And it passed.
“It’s been looked at about three or four times over the course of two days,” said Michael Vartorella, chief ride inspector for Ohio’s Division of Amusement Ride Safety. “It was inspected at a couple of different stages and it was signed off” on Wednesday.
So what caused the 40-foot structure to break apart on opening night at the Ohio State Fair, killing one person and injuring six others?
Investigators are still trying to find answers. What we know so far comes from footage before the accident and witness accounts.
Similar ride shut down at NJ county fair
Reports indicate that a ride similar to the one involved in the accident in Ohio has been shut down at the Monmouth County Fair a the Freehold Showgrounds in New Jersey. Officials said the ride was shut down out of an abundance of caution.
The Fire Ball, which has at least six rows of seats that spin around in the air as the entire structure moves like a pendulum, broke apart while it was in motion.
A video posted online appears to show several people on the Fire Ball seconds before parts of the structure, including a full row of seats, split up and fell.
‘Landing on their backs on the concrete’
Kaylie Bellomy was moments away from getting on the Fire Ball. She was waiting in line when the tragedy ensued.
“Everybody was running. I got ran over trying to get out of the way,” she told CNN affiliate WCMH. “I just don’t think I’ll ever ride a ride ever again.”
Rhonda Burgess said one of her sons was standing in line at a nearby ride when the Fire Ball came undone.
“The ride had four riders per cart. This piece snapped off and the riders came out of the cart,” she said. “At least two (people) flew through the air at least 20 feet before landing on their backs on the concrete.”
Deputies rushed to scene and asked fairgoers to step back.
Video footage showed the chaos and horror of witnesses. “It’s my worst nightmare!” one person screamed.
Two people critically injured
Authorities have not identified the person killed. Six others were hospitalized after the disaster.
Three people were being treated at Wexler Medical Center in Columbus, with two in critical condition and one in serious condition, hospital officials said Thursday.
At Grant Medical Center in Columbus, one person remains in serious condition, and two people have been discharged, medical officials said.
David Evans, medical director of Wexner Medical Center, said it was helpful to see video of the incident that was posted to social media because it helped the staff look for certain types of injuries.
“Having that video really showed us that this was a great force and a great mechanism, really consistent with a high-speed motor vehicle crash with an ejection, really something more along those lines,” he said.
An ‘aggressive thrill” ride
For days, inspectors had overseen the assembly and then inspected about 70 rides ahead of opening day.
“My children, my grandchildren ride this equipment so our guys do not rush through this stuff,” Vartorella said.
Four rides failed an inspection on Monday, but there were no red flags when inspectors examined the Fire Ball.
The Fire Ball is described as an “aggressive thrill” and has become one of the most popular thrill rides since its debut in 2002, according to Amusements of America, the ride’s operator.
Gov. John Kasich quickly ordered a full investigation and ordered all fair rides to shut down for inspections.
“The fair is about the best things in life and tonight with this accident it becomes a terrible, terrible tragedy,” Kasich said in a news conference.
The Ohio State Fair draws thousands of people for its deep-fried foods, thrill rides and its unique life-size butter cow sculptures. Last year, more than 920,000 people attended the fair, organizers said.
Most activities will resume Thursday while the rides undergo new inspections, fair officials said.
“Our hearts are heavy for the families of those involved in last night’s tragic accident,” they said in a statement. “We have shut down all rides until the state has inspected each and every ride again and deemed them to be safe,”
CNN’s Chris Boyette, Amanda Jackson, Lee Smith, Lauren del Valle, Connor Spielmaker and Jessica Suerth contributed to this report.