HIXSON, HAMILTON COUNTY (WRCB)  -- One bus was missing from Hixson's middle and high schools' dismissal Friday afternoon.

That's because it crashed head on into a tree on Hixson Pike Thursday morning, sending the students, the bus driver and a bus monitor to the hospital.

"We can't comment on anything because it's premature right at this point," says Hamilton County Schools Transportation Supervisor Ben Coulter. 

Coulter would not discuss the details of the crash but said investigators are working hard to piece it together.

"The general things that we do is that we pull the video on the bus and we look at the video on the bus," says Coulter.

However, that will prove to be difficult this time.

Coulter says the surveillance camera was not working at the time of the crash. Investigators will have to rely on the bus's GPS for their information.

"The GPS will tell us the speed and how fast they were going, what stops they made," says Coulter.  

Channel 3 had hoped to learn more about the woman who was driving the bus, Miss Connie Thurman.

Coulter would only say she has driven a bus for the Hamilton County School System for 18 years.

He says she has never been in a bus accident before, but that is as far as he would go.

"I'd rather not talk about that until we finish the investigation," says Coulter.