A coroner says a teenager in the Asiana Airlines crash was killed when she was struck by a vehicle at the scene.

San Mateo County Coroner Robert Foucrault on Friday disclosed the findings of his autopsy on 16-year-old Ye Meng Yuan, a Chinese student.

Foucralt said she died of multiple blunt injuries that are consistent with being run over by a motor vehicle. He did not say what that vehicle was.

San Francisco Fire Chief Joanne Hayes-White said officials believe the girl was struck by a specialized fire vehicle.

Authorities confirmed last week that Yuan was hit by a vehicle racing to extinguish flames that broke out on the Boeing 777.

Police said she was on the ground and covered in fire-retardant foam that rescuers had sprayed on the wreckage.