LOUISVILLE, Ky. (WDRB) -- A teenage Jefferson County Public Schools student sustained serious injuries Tuesday after falling out of a moving school bus. 

The incident happened near Breckinridge and Preston Streets when two female students from Breckinridge Metro High School were involved in an altercation on the bus, according to JCPS spokesperson Ben Jackey.

He said one student backed away from the fight, fell down the bus's stairwell and out of the bus. 

The doors on the bus were closed at the time and district officials are trying to determine how she fell out of the vehicle, Jackey said.

He said the incident happened shortly after dismissal Tuesday afternoon, while there were between five and 10 students on the bus. 

The driver, Dustin Eisenback, immediately stopped the bus and called 911. 

The girl was transported to the hospital with severe injuries, Jackey said. 

Her condition is not known. 

Jackey says JCPS has video of the entire incident and it is under investigation. 

Eisenback has been placed on non-driving duties while the incident is being investigated. 

He has been employed with JCPS since October 2012 and has no previous disciplinary action in his file. 

"Safety and security has to be our number one priority, both in the classroom and on the bus," Jackey said. "We are reviewing this matter to make sure everything possible was done to ensure the safety of those students on this bus."

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