Ms Harding was a passenger in one of two cars hit
The family of a woman killed on a level crossing have received a "full and complete apology" from Network Rail.
Jane Harding, 52, died at the Herefordshire crossing when a train crashed into her vehicle on Saturday.
Safety barriers were up at the crossing at Moreton-on-Lugg, British Transport Police said.
"We consider that the accident is most likely to have been due in some way to Network Rail," a Network Rail spokeswoman said.
"Network Rail has extended a full and complete apology to the family.
"We would also like to extend this apology to everyone who has been so deeply affected by the accident and to the community of Moreton-on-Lugg."
A signalman has been suspended by Network Rail as part of its inquiry into the crash, although the company said this was routine.
Ms Harding, a hairdresser from Marden, was a passenger in one of two cars on the crossing when a train crashed into it on Saturday.
Her husband, Mark, who was driving, suffered pelvis and shoulder injuries.
A mother and her 11-year-old daughter in the second car suffered minor injuries.