MOULTRIE, Ga. — A Colquitt County teen-ager charged in a Friday incident involving a replica pistol on a school bus was in state custody after he was arrested again on Monday in an apparent unprovoked attack of a student on another bus.

Police say the student also attacked the bus driver when she intervened and made death threats toward both victims before exiting the bus.

The driver reported the Monday attack, which occurred while the bus was stopped to make a pick up near the Ryce Community Center in Northwest Moultrie, to police and school officials at about 7:45 a.m.

While the bus was stopped the suspect, identified as a Willie J. Williams Middle School student who had been attending Colquitt County Achievement Center, boarded and went to the back where he attacked another Willie J. Williams student, according to the Colquitt County Sheriff’s Office.

The student was beaten and bitten on the elbow during the assault, police said. The driver was attacked when she tried to separate the two. Neither received injuries serious enough to require medical attention.

The suspect in Monday’s assault was arrested on Friday after, police said, he was found to have a replica pistol on a school bus that was stopped at Odom Elementary School.

An initial report had indicated he was an Odom student, but law enforcement said Wednesday that he wasn’t. The bus was stopped at Odom School to allow the transfer of older students to a bus that would take them to Willie J. Williams.

After he was released to a family member on Friday, the family member reported that he ran away the same day and he was not heard from again until he showed up at the bus stop in Northwest Moultrie on Monday. The relative suspects he is involved in gang activity, but that had not been confirmed, police said.

Prior to his Friday arrest on a charge of possession of a weapon on a school campus, the boy previously had been assigned to the Achievement Center after being expelled from his home school due to prior issues there. He had received a 10-day suspension from the Achievement Center related to Friday’s incident, police said. School officials had not yet taken any action related to the Monday attack on the bus.

Police charged him with three felony counts in the Monday incident — aggravated assault and two counts of terroristic threats and acts — as well as a misdemeanor count of criminal trespass and two counts of simple battery.

He is being held at a state youth detention facility in Crisp County.