Leah Robinson, 5, died early Thursday morning of injuries from the crash. The two other minor passengers, ages 3 and 5, had less serious injuries.
According to the Missouri State Highway Patrol, the minivan, driven by Katelynd Cartwright, 24, did not yield and was hit by the train. Troopers say a yield sign and railroad cross-buck were both used.
Cartwright sustained serious injuries and Michael Teed, 26, was air-lifted from the scene. No updates yet on their conditions.