SAN JOSE -- A VTA light rail train struck and killed a woman wearing dark clothing on the tracks just outside the Willow Glen neighborhood early Christmas morning, authorities said.

Sgt. Heather Randol, a San Jose police spokeswoman, said emergency responders found the woman's body after it was struck about 100 to 200 yards from the Curtner light rail station, at Curtner Avenue, just west of the Highway 87 onramp, at 1:30 a.m. The coroner had not identified her Wednesday.

Police were still investigating whether the death was a suicide or an accident.

The woman was walking on the tracks, and the train was on its way to the rail yard to be "put to bed" for the evening after finishing up its last routes from the previous day and was not carrying any passengers, officials said.

"She was wearing dark clothing, and the train wasn't able to stop in time," said Colleen Valless, a spokeswoman for the Valley Transportation Authority.

Valless said the train has been impounded at the rail yard while police continue to investigate.

The VTA said service was restored on its reduced holiday schedule by 6 a.m. When light rail service began for the day an hour earlier, the VTA ran buses to transport passengers between the Santa Teresa and Tamien stations.

Contact Mike Rosenberg at 408-920-5705. Follow him at Twitter.com/RosenbergMerc.