A 12-year-old boy was charged with sexually assaulting two girls on a school bus in Fairfax County, police said Friday. On November 13, two students from Camelot Elementary School in Annandale informed their parents that they had been sexually assaulted by a boy in the CA02 school bus, Fairfax County Police said. The police did not reveal the details of the date of sexual assault, the presence of other students or the presence of a driver or an adult in the bus at this moment. The police also did not detail the nature of the offenses. The boy was charged with two counts of sexual assault and two counts of sexual penetration, police said. The child was treated Friday at the county's juvenile detention center and handed over to his parents' custody. Police said that if parents fear that their child has been inappropriately touched, they should contact the Major Crime Bureau at 703-246-7800. Public school officials in Fairfax County did not immediately respond to a request for comment. .