SAN FRANCISCO (AP) - A girl who had been in intensive care since the crash-landing of an Asiana Airlines flight has died, hours after authorities confirmed one of the two Chinese teenagers killed in the disaster was hit by a fire truck speeding to the crash site.

The disclosure about the Chinese teenager raised the tragic possibility that she could have survived the crash only to die in its chaotic aftermath.

No one knows yet whether the two teens lived through the initial impact at the San Francisco airport. But police and fire officials confirmed Friday that Ye Meng Yuan, 16, was hit by a fire truck racing to extinguish the blazing Boeing 777.

"The fire truck did go over the victim at least one time. Now the other question is what was the cause of death?" police spokesman Albie Esparza said. "That's what we are trying to determine right now."

(AP) In this Saturday, July 6, 2013 aerial photo, a firefighter, right, stands by a tarpaulin sheet... Full Image

Her close friend Wang Linjia, also 16, was among a group of injured passengers who did not get immediate medical help. Rescuers did not spot her until 14 minutes after the crash. Wang Linjia's body was found along with three flight attendants who were flung onto the tarmac.

The other girl, also from China, died Friday morning. San Francisco General Hospital said she had been in critical condition since arriving Saturday after the accident. Officials did not identify the girl at the request of her parents. Her age was also withheld.

Moments after the July 6 crash, while rescuers tried to help passengers near the burning fuselage, Wang Linjia and the flight attendants lay in the rubble almost 2,000 feet away. A group of survivors called 911 and tried to help them.

Members of the group - martial arts athletes and their families returning from a competition in South Korea - said that after escaping the plane, they sat with at least four victims who appeared to be seriously hurt. They believe one of them was one of the girls who died.

(AP) In this Saturday, July 6, 2013 aerial photo, a tarpaulin sheet, to the right of the fire truck,... Full Image

San Francisco Fire Department spokeswoman Mindy Talmadge said Friday that when airport personnel reached the group near the seawall, Linjia was dead. She did not know when the girl had died.

The flight attendants remained hospitalized Friday.

Talmadge also confirmed that an Associated Press photograph of a body under a yellow tarp near the burned-out jet was the other victim, Meng Yuan.

The photo, taken from above, shows firefighters looking down at the tarp, and there are truck track marks leading up to it.

(AP) A man walks under a wing of Asiana Flight 214, which crashed on Saturday, July 6, 2013, at San... Full Image

"The driver may not have seen the young lady in the blanket of foam," said Ken Willette of the National Firefighter Protection Agency, which sets national standards for training airfield firefighters. "These could be factors contributing to this tragic event."

He said fire trucks that responded to the Asiana crash would have started shooting foam while approaching the fuselage from 80 or 100 feet away. The foam was sprayed from a canon on the top of the truck across the ground to clear a safe path for evacuees. That was supposed to create a layer of foam on the ground that is several inches high before the truck gets to the plane.

The victims were close friends and top students, looking forward to spending a few weeks at a Christian summer camp in California, where they planned to practice English and boosting their chances of attending a U.S. college.

Their parents were flown to San Francisco after their deaths where the Chinese consulate was caring for them.

(AP) The rear of Asiana Flight 214, which crashed on Saturday, July 6, 2013, is seen at San Francisco... Full Image

Photos of the girls showed the pair with wide grins flashing peace sign. In one photo, they formed their arms into the shape of a heart.

The airliner collided with a rocky seawall just short the runway. Dozens of other passengers were injured, and although 182 were taken to hospitals, most suffered only minor injuries.

Nearly a week after the crash, the investigation indicates the pilots, a trainee and his instructor, failed to realize until too late that the aircraft was dangerously low and flying too slow.

Nothing disclosed so far by the National Transportation Safety Board investigators indicates any problems with the Boeing 777's engines, computers or automated systems.

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