snippet from BBC News at 19:17
Engine failure may have been a factor in Wednesday's crash of a Turkish Airlines plane at Amsterdam's Schiphol airport, the chief investigator says.
Pieter van Vollenhoven told Dutch state television that the way the aircraft fell directly from the sky suggested that its engines might have stalled.
Nine people were killed when the Boeing 737-800 crashed short of the runway.
A Dutch official said five Turks and four Americans were among the dead. Six people remain in a critical condition.
Eighty-six people were injured altogether.
Mr Van Vollenhoven, chairman of the Dutch Safety Board, said a reason for the apparent engine failure had not yet been established.
"If you then lose speed, you then literally fall out of the sky," he was quoted as saying.
Dutch officials have taken the flight data and voice recorders to Paris, where French authorities are providing technical assistance.
Mr Van Vollenhoven said analysis of the recorders might be completed as early as Friday, but that the Dutch Safety Board would probably not announce any preliminary findings until next week.
"We hope to have a firmer grip as soon as possible," he told NOS television, adding that the information retrieved from the recorders was of high quality and would aid reconstruction of the accident.