Some scary moments Friday  for some Catoosa County elementary school students, when the bus they were riding in caught fire.

It happened just after 3 o'clock Friday afternoon in Ringgold.

It seems that the  bus cabin was filled with smoke and firefighters were called to put out the flames.

In all about three fire trucks,  one ambulance and several sheriff's cars responded.

All of the 20 or so children were able to get off the bus safety and another bus picked them u leaving the charred bus in the road. 

A spokesperson with Catoosa County Schools says the bus driver followed procedure to the letter by evacuating the bus and notifying the bus transportation dispatch.

She says within the last 30 days, the entire Catoosa bus fleet was inspected by the state and all buses passed.

Officials believe the fire may have started with the alternator.