Two male students at a Fairfax County middle school have been charged with sexual battery on a female student on a school bus parked at their school, county police said.

The 11- and 12-year-old students at Glasgow Middle School in Lincolnia, Va., are facing misdemeanor sexual battery charges in the Nov. 16 incident, which took place on a late bus after school, police said.

The victim told investigators that she boarded the bus on the GMLR10 route and walked to the back, according to a search warrant filed in Fairfax County Circuit Court.

A short time later, she told investigators, a student slapped her on the buttocks. After she asked the student what he did, the student replied, “I touched your butt,” the girl told investigators.

The girl said the student grabbed her buttocks and breasts over a period of 10 to 12 minutes, according to the search warrant. The girl told investigators that the student also held her down and straddled her as a second student held her feet down. The girl yelled at them to stop.

At some point, the second student tried to force the girl’s face into the first student’s crotch. Police said it did not appear that a driver was on the bus at the time of the incident, although they could not say for sure.

Investigators wrote that the alleged sexual assault was reported to authorities by Glasgow’s assistant principal, Stefan Mascoll, after he was alerted to it by a parent of a student.

A county police officer who reviewed video from the bus wrote in the search warrant that it showed the two students grabbing the girl several times.

The Washington Post does not generally name the victims of sexual assault or juveniles accused of crimes.

Fairfax County schools said in a statement that “appropriate disciplinary action was taken against the students involved.”