The boy, 11, allegedly followed the girl, also 11, into the restroom at Norland Elementary School in Miami on March 3, locked the door, told her to get on her knees and forced her to perform oral sex on him, the Miami Herald reported.
Two other boys, ages 11 and 13, allegedly acted as look-outs outside the restroom, the newspaper said.
The boy who was allegedly inside the restroom was charged with sexual battery on a child under 12 and with false imprisonment. The other two youths were charged with false imprisonment and as accessories to sexual battery. None were taken into custody, and the charges were filed directly with the Miami-Dade County State's Attorney's Office.
A school spokesman said the alleged attackers have been suspended and would be recommended for expulsion.
The girl's mother said she did not get a call about the incident until two days later, but said family members immediately noticed a change in the girl's behavior.
"She kept her head down," the mother said about the girl, who has Asperger's Syndrome, a mild form of autism. "She wouldn't hold her head up, she wasn't the same."
"Instead of just making a quick arrest, we tried to gather as much information as we could," Miami-Dade Schools Police Chief Charles Hurley said.