A coroner won't report for "at least two or three weeks" on whether one of the two Chinese girls who died in the Asiana Airlines plane crash in San Francisco was struck and killed by an emergency vehicle. San Mateo County Coroner Robert Foucrault said while autopsies of the two teenagers - Zhejiang students Ye Mengyuan and Wang Linjia - have been completed, he wants to review written information from safety agencies and audio dispatch files. "This is a very high-profile case and has obviously generated a lot of attention," Foucrault said. "I want to make absolutely sure my conclusions are correct." San Francisco fire officials acknowledged that one of their trucks may have accidentally struck one of the two girls, who were the only fatalities. Investigators have reviewed airport surveillance footage to see if it showed someone being struck by a fire truck and found "it wasn't conclusive", said National Transportation Safety Board chairwoman Deborah Hersman.