Despite the bus driver's efforts to stop them, "That student and her parent boarded the bus and confronted the other student and a physical altercation ensued," Orr said.
Police ultimately broke up the fight.
“This type of behavior — by the students and the parent — is unacceptable, and I want to assure you that we are taking appropriate action,” Orr said.
Both students, who are freshmen at Central Gwinnett High, face disciplinary action and battery charges, according to police and school officials.
“It was pretty bad,” student Jaleel Kyon told Channel 2 Action News after recording the fight. “They were jumping over seats and everything.”
Underwood was released on bond Thursday.