SAN MATEO, Calif. (AP) — As the wreckage of Asiana Flight 214 burned, Ye Meng Yuan was lying on the ground just 30 feet away, buried by the firefighting foam rescue workers were spraying to douse the flames.

No one knows exactly how the 16-year-old Chinese student got to that spot, but officials say one thing is clear now: She somehow survived the crash.

And in the chaotic moments that followed — flames devouring the fuselage, those aboard escaping by emergency slides, flight attendants frantically cutting away seat belts to free passengers — a fire truck ran over Yuan, killing her.

The new details — released Friday by the coroner's office — compounded the tragedy for her family and confirmed the growing suspicions that emergency workers have had since soon after the July 6 crash: One of the three who died did so by rescuers' actions.

"There's not a lot of words to describe how badly we feel, how sorry we feel," said San Francisco Fire Chief Joanne Hayes-White.

Yuan's family was upset after learning the details of their daughter's death and wants her body returned to China, San Mateo County Coroner Robert Foucrault said. "It was a difficult conversation," he said.

Hayes-White said she was trying to arrange a meeting with them and that the "tragic accident" would prompt a review of how the fire department uses the foam and responds to emergencies at the airport.

"There's always room for us to evaluate and improve our response," she said. "(There's) very unfortunate news today. However, many, many lives were saved and we made a valiant effort to do so."

In a statement, the Chinese Consulate called on authorities to determine responsibility for Yuan's death.

Online comments by Chinese citizens, while expressing sadness at the Ye's death, praised the U.S. authorities for revealing the truth and contrasted that transparency with frequent cover-ups by their own governments.

Hayes-White said she did not immediately foresee any disciplinary action. San Francisco police and the National Transportation Safety Board are investigating the incident.

In all, 304 of the 307 people aboard the Boeing 777 survived the crash at San Francisco International Airport.

Yuan and her close friend, 16-year-old Wang Linjia, who also died, were students at Jiangshan Middle School in Zhejiang, an affluent coastal province in eastern China, Chinese state media has reported. They were part of a group of students and teachers from the school who were heading to summer camp in Southern California.

Yuan and Linjia were seated at the back of the plane. Authorities say the jetliner came in too low and too slow, clipping its landing gear and then its tail on a rocky seawall just short of the runway.

Linjia's body was found near the seawall at the edge of the runway. It was unclear how Yuan got from the airplane to the spot where she died. Investigators believe she was down on the ground and not standing up during the "volatile" and "dangerous" aftermath of the plane crash, the fire chief said.

Foucrault declined to go into detail on how he determined the teenager was alive before she was struck, but said there was internal hemorrhaging that indicated her heart was still beating at the time.

Authorities confirmed last week that Yuan was hit by a vehicle racing to extinguish the flames in the plane. Police said she was on the ground and covered in the foam that rescuers had sprayed on the wreckage.

Firefighting crews apply the foam not only to stop the fire and cool the fuselage but to suppress fuel vapors. They continue to spray it to maintain the blanket because it can break down under certain conditions, fire department spokeswoman Mindy Talmadge said.

Fire trucks usually start shooting foam while approaching the fuselage from 80 or 100 feet away. The foam is also used to clear a safe path for evacuees, experts say.

"This is very rare. I've never heard of it before. I'm not aware of any other similar incident in my 35 years in the fire service," said Ken Willette, a division manager for the National Fire Protection Agency, which sets national standards for training airfield firefighters.

Willette said that amid the chaotic scene that included a burning aircraft, hundreds of survivors running for their lives — as well as those who needed to be rescued — the firefighters' other primary objective was to put down a foam blanket to suppress the fire.

"Their training kicks in at a time like that and they focus on what they see on scene," Willette said. "Their mission going into that operation was getting into the aircraft, to save as many lives as possible and avoid hitting any of the people who may have been going away from the scene.

"But for reasons unknown, the coroner has confirmed that this young lady who was in the area of the crash was run over by a fire apparatus. This was a very tragic accident."

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Associated Press writers Mihir Zaveri in San Francisco and Didi Tang in Beijing contributed to this report.

ARLINGTON, Texas (AP) — Investigators will try to determine if a woman who died while riding a roller coaster at a Six Flags amusement park in North Texas fell from the ride after some witnesses said she wasn't properly secured.

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 Texas Giant roller coaster — dubbed the tallest steel-hybrid coaster in the world — but did not specify how she was killed.

Witnesses told local media outlets the woman fell. The woman's name has not been released.

"She goes up like this. Then when it drops to come down, that's when it (the safety bar) released and she just tumbled," Carmen Brown of Arlington told The Dallas Morning News. Brown said she was waiting in line to get on the ride when the accident happened. She witnessed the woman being strapped into the ride.

"They didn't secure her right. One of the employees from the park — one of the ladies — she asked her to click her more than once, and they were like, 'As long you heard it click, you're OK.' Everybody else is like, 'Click, click, click.' " Brown told the newspaper.

"Hers only clicked once. Hers was the only one that went down once, and she didn't feel safe, but they let her still get on the ride," Brown said.

Six Flags expressed sadness over the death and said the ride would be closed Saturday.

"We are working closely with authorities to determine the cause of the accident," Parker said in a statement Saturday. She also said a concert scheduled for Saturday had been canceled.

Arlington police Sgt. Christopher Cook, the department spokesman, referred all questions to Parker. A message left for Parker by The Associated Press was not returned. No other details were available.

The Texas Giant is 14 stories high, and has a drop of 79 degrees and a bank of 95 degrees. It can carry up to 24 riders. It first opened in 1990 as an all-wooden coaster but underwent a $10 million renovation to install steel-hybrid rails and reopened in 2011.

When the car that the woman had been riding in returned to the loading zone, two people got out and were visibly upset, Rockwell resident John Putman told the Fort Worth Star-Telegram.

"They were screaming, 'My mom! My mom! Let us out, we need to go get her!" Putman told the newspaper.

Also Friday, an Ohio amusement park's thrill ride malfunctioned when a boat accidentally rolled backward down a hill and flipped over in water, injuring all seven people on it. Operators stopped the Shoot the Rapids water ride after the accident, said officials with Cedar Point amusement park in Sandusky, Ohio.

Six Flags Over Texas opened in 1961 and was the first amusement park in the Six Flags system. It is 17 miles west of downtown Dallas. The park's first fatality happened 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 overturned in 2 to 3 feet of water.

ATLANTA (AP) — One week after a jury found George Zimmerman not guilty in the death of unarmed teen Trayvon Martin, people began to gather for rallies scheduled nationwide to press for federal civil rights charges against the former neighborhood watch leader.

The Florida case has become a flashpoint in separate but converging national debates over self-defense laws, guns, and race relations. Zimmerman, who successfully claimed self-defense, identifies as Hispanic. Martin was black.

The Rev. Al Sharpton's National Action Network organized the "Justice for Trayvon" rallies and vigils outside federal buildings in at least 101 cities: from New York and Los Angeles to Wichita, Kan., and Birmingham, Ala.

Sharpton wants the Justice Department to pursue a federal civil rights case against Zimmerman.

Rallies are scheduled for noon local times. On Saturday morning on a plaza in downtown Manhattan, Sharpton spoke to supporters, telling them he said he wants a rollback of stand-your-ground self-defense laws.

"We are trying to change laws so that this never, ever happens again," Sharpton said.

Martin's mother, Sybrina Fulton, also spoke to the New York crowd. "Today it was my son. Tomorrow it might be yours," she said.

Martin's brother, Jahvaris Fulton, also was to attend the New York event. Martin's father was scheduled to participate in a rally in Miami, where a crowd also gathered Saturday morning.