The 4-year-old daughter of a Billings family died Wednesday after their vehicle caught fire while traveling on Interstate 90 West outside of Big Timber, and four others were taken to the hospital, according to Montana Highway Patrol officer Eric Fetterhoff.
Feterhoff, who responded to the scene a little before 6 p.m., said the incident occurred after a Subaru Impreza occupied by four people caught fire between Big Timber and Livingston for unknown reasons.
A mother and father, their 3-year-old daughter and one of their friends' children were inside the car at the time.
The trooper said their friends, who were traveling behind them, called and told them to pull over after they saw gas coming from their car.
By the time they did, the vehicle was already "fully engulfed."
The trooper said they weren't able to pull the 3-year-old girl from the car. She was in the backseat in a forward-facing car seat at the time.
The other three escaped with what appeared to be minor burns and were transported to the hospital. One of the occupants from the other vehicle was also taken to the hospital.
The girl and her mother were flown to Bozeman Deaconess Hospital. The others were taken to another nearby hospital.
The incident is under investigation.