SANTIAGO DE COMPOSTELA, Spain (AP) -- Spanish officials are investigating possible failings by the 52-year-old driver of a speeding train that careened out of control, killing 80 people and maiming scores of others.
The regional government confirms that the train driver, who's hospitalized, is being questioned as a possible suspect.
Investigators are also looking at the train's built-in speed regulation systems. Experts say one, or both, must be at fault for the accident Wednesday night in Santiago de Compostela.
According to eyewitness accounts and video of the crash, speed may have been a factor. The train was going so fast, its cars tumbled off the tracks like dominos. One witness says he saw the train "coming out of the bend at great speed and then there was a big noise."
An analysis of the video by The Associated Press indicates that the train was traveling at least 89 miles an hour, and possibly over 100 miles an hour. The speed limit in the area is 50 miles an hour.
Church: Va. woman among Spain train crash victims
Catholic Church officials say an employee of a diocese outside Washington, D.C., was among the 80 people who died in the Spain trash crash this week.
The Diocese of Arlington says on its Facebook page that Ana Maria Cordoba, an administrative employee from northern Virginia, died in the wreck.
Catholic News Service, a division of the U.S. Conference of Catholic Bishops, reports that Cordoba, a benefits specialist, was traveling with her husband, Philippe, and her daughter, Christina, a rising high school senior in Arlington.
CNS reports that Philippe and Christina Cordoba were in stable condition at a hospital.
Family members were on their way to see the Cordobas' son, who had completed a pilgrimage to Santiago de Compostela.
Messages left for the diocese late Thursday were not immediately returned.