The driver of an SUV that collided with a freight train Monday afternoon could have been trying to outrun the train, Shelby County Coroner Doug Ballard said.

The wreck, which occurred on Shelby County 377 in Chelsea, killed Chelsea High ninth-grader Hannah Yeager, 15, and injured five other students.

The students were less than a mile from the school when the wreck occurred.

Ballard said based on the impact of the vehicle it appears the driver was trying to outrun the train. "We don't know, but that's the way it looks. That's what my chief deputy coroner told me," he said.

Ballard said it's still unknown who was driving the 4Runner.

Three of the passengers remained in the hospital Tuesday, with two others released after receiving treatment.

Joshua Ankesheiln, 15, who was taken by Lifesaver helicopter, and Payton Hallmark, 15, were listed in good condition at UAB Hospital, spokesman Hank Black said.

Jacob Birdsong 15, was listed in fair condition at Children's Hospital, spokesman Adam Kelley said.

Morgan Williamson, 16; and Krista Vick, 15, were treated and released from UAB, Black said.

The flag at Chelsea High School flew at half mast Tuesday, and school officials said "several hundred" sought grief counseling from school counselors, local pastors and counselors brought in from Amelia House.

Flowers were placed near the railroad crossing where the wreck occurred.