SAN FRANCISCO (AP) -- Federal investigators says they have reviewed airport surveillance video to determine whether an emergency vehicle ran over one of the victims of the plane crash at San Francisco International Airport but have not been able to reach any conclusions.
National Transportation Safety Board chairwoman Deborah Hersman on Monday called the possibility that a teenage girl was run over a "very serious issue." She said investigators want to make sure they have all the facts before reaching any conclusions.
Hersman said the coroner has not yet determined the girl's cause of death.
San Francisco Fire Chief Joanne Hayes-White and Assistant Deputy Chief Dale Carnes both said earlier Monday that one of the two teenage girls killed in the crash may have been struck by an emergency vehicle.
[Slideshow: Asiana Airlines plane crash
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