Murfreesboro police are investigating after a bullet was found on a city school bus Tuesday morning.
A student riding the bus saw the bullet on the floor and thought it was a crayon.
The student pointed the object out to the bus driver who immediately pulled over and notified dispatch who called police.
"Anytime any ammunition or a bullet is found we are going to take it serious as possible," Murfreesboro City Schools Director of Communication Lisa Trail said. "We don't know how the bullet got on to the bus. It could have been there for a day or it could have been there for 30 minutes we are not sure of that."
The bullet, a .357 magnum Winchester round, was found in the center isle toward the front of the bus.
Police responded to the scene and interviewed the students onboard. Officers also searched the students and their backpacks. No other ammunition or weapons were found.
The bus had just dropped students off at Cason Lane Academy, a K-6 school. Police searched and interviewed those students as well.
In addition to searching the students, officers also searched Cason Lane Academy for more ammunition or weapons because the students were dropped off at the school before the bullet was discovered.
"All students who rode the bus that day were talked to, to make sure there wasn't something going on," Trail said.
The remaining students were en route to Mitchell Nelson Primary School when the bullet was found.
"Murfreesboro police took over and did everything they do to keep our kids safe," Trail said.
The investigation into how the round got on the bus and where it came from is ongoing.
As part of the investigation police also reviewed video from cameras on board the school bus.
Murfreesboro City Schools has around 7,600 students in grades pre-K through sixth grade.
Parents of the students who rode the bus were notified of the bullet by district leaders.