A four-year-old girl is fighting for life after the car she was in collided with a train on a railway crossing.
The youngster was airlifted to hospital in Sheffield and is in intensive care following the incident in North Nottinghamshire on Tuesday.
The driver, a 67-year-old woman, was taken to hospital in nearby Doncaster with neck injuries and bruising.
A British Transport Police (BTP) spokesman said: "BTP officers were called to the rail line at Beech Hill crossing, Springs Road, Misson Springs, Nottinghamshire, following a report of a train striking a car.
"The car contained two occupants, a woman and a child. The child, a four-year-old girl, sustained serious injuries and has been airlifted to hospital in Sheffield, where she is in intensive care.
"Officers are working to establish the full circumstances surrounding the incident, including how the vehicle came to be on the tracks.
"This will include establishing whether there were any witnesses to the incident, while specialist officers will also examine the scene and the car in question."
The scene of the collision is a crossing about two miles east of the nearest village of Blaxton on a small country lane which connects the B1396 to the village of Misson.
The crossing has barriers which go half way across the road and these were open on Tuesday evening with the red warning lights still flashing.
Speaking at the scene, Inspector Andy Selby, from BTP, said he could not comment at this stage on whether the barriers and lights were working correctly.
He also had no information about whether there had ever been other accidents at this site.
There was no sign of the car involved at the crossing except for some small pieces of debris from a vehicle on the track.
The train was about a quarter of a mile further down the track, towards Finningley Station.
There is a house next to the level crossing, but very few other homes near the isolated scene, which is in the middle of extensive, flat farmland.
The Office of Rail Regulation (ORR) has begun working with police to investigate the crash.
An East Midlands Trains spokesperson said the 11.54 service from Lincoln to Doncaster remained upright on the tracks following the collision.
A spokesman said: "Our first priority and thoughts are for those involved in the incident. Our staff ensured that passengers were safely escorted from the train and these passengers will be taken forward to Doncaster by alternative road transport.
"We will work with Network Rail and the British Transport Police to ensure those involved in this incident are given every assistance."
The spokesman added that a bus service is operating on the affected route between Lincoln and Doncaster.