Image copyright AP Image caption That followed a crash in 2012 involving a New Jersey driver
Two children have been killed and 15 others injured after a car slammed into a crowd at a drag racing event in north Texas.
The race at the Dallas International Raceway was halted and 26 people were being treated at hospital.
The race did not appear to be in progress at the time of the crash. Two other people were treated at the scene, while the rest were taken to hospital.
The driver was not thought to be seriously injured.
Image copyright AP Image caption Witnesses said the car, which appeared to be travelling at a speed of around 70mph, ripped off a rail at the rear of the stands
Police said the car, which appeared to be travelling at a speed of around 70mph, came off the track at a “very high rate of speed” and tore off a rail at the rear of the stands.
It then ran over people who were watching the drag races and caused a crush.
The New York Times reports that the driver was the father of one of the victims.
He lost control of the car during a round of racing and hit the crowd. A witness at the scene said he was taken away on a stretcher.
Image copyright Reuters Image caption One witness said: “I thought it looked like a tornado had come through there”
The victims were taken to three hospitals. The seven adults who died have not been named.
“The worst thing we’re going through right now is people are crushed and this is happening in front of our eyes,” Dallas County judge Clay Jenkins said.
Image copyright Getty Images Image caption Sunday’s race was thought to be the first weekend of events at the facility
“The wild west is over, the NRA is over and death and life are here, very real.”
Video posted on social media appeared to show the driver before the crash, and showed cars on the track at a high speed in a corner marked by a speed limit sign.
A witness told BBC Radio 5 live the car “rolled back” and came to rest under a row of people.
“I heard it bump, it sent a shockwave through the stadium where they were watching this race,” Tyler Marango said.
Image copyright Getty Images Image caption Racegoers recorded images of the aftermath of the crash on their phones
Another witness, Antonio Espinosa, said: “It was like a tornado coming, if I could put it like that. It just carried people across the place.”
Dallas County sheriff’s deputy George Nielsen said the race had been postponed, and that a safety briefing would be held at the track at 10:00 BST.
He later said: “We will be using helicopters to bring the injured people to the hospital so they can get the best care possible.”
One witness, Lyudmila Krasnova, filmed the aftermath of the crash on her phone and said she could see people “bowing in death”.
“It is a message to the organisers to ensure safety of everybody. I saw three corpses,” she told the Dallas Morning News.
Image copyright AP Image caption People wrote messages of condolences and prayers on Twitter
Dallas Drag Racing Association president Steve Heiner told the Dallas Morning News the event was apparently due to be the last for the season and all winners would be paid out the same day.
However, Mr Heiner said: “It is so tragic what has happened and it is going to have an impact. Our hearts go out to all the families and to everyone who has been affected.”
Sunday’s race was thought to be the first of several the facility has planned this year, according to the US network NBC News.
The Dallas County Sheriff’s Office’s ‘Collision Reconstruction Unit’ is attending the scene and several other law enforcement agencies are conducting a full investigation.