BALTIMORE (WJZ)—An investigation is underway at a public boarding school after a 13-year-old student alleges he was sexually assaulted.

Christie Ileto explains the boy claims a group of his peers are behind the alleged attack.

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A 13-year-old student alleges he was raped on campus.

Baltimore City police tell WJZ they’re investigating, speaking with multiple people of interest at the SEED School of Maryland.

Officials say the alleged incident happened May 28.

The victim claims a group of boys held him down, and sexually assaulted him with a toothbrush or pencil inside a dormitory.

“Ninety percent of the time, the child knows who abused them. It’s not stranger danger,” said Adam Rosenbaum, Baltimore Child Abuse Center.

The Baltimore Child Abuse Center is working with police on this case.

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The center is tight lipped, but parents aren’t.

“That incident is just unacceptable,” said Tracey Goodie.

The public boarding school for at-risk children allows students to stay in dorms from Sunday afternoon to Friday.

Parents are asking “where were the counselors? Where were they? How did this happen?” one parent, who wanted to be identified only as “April,” said.

The school declined an on-camera interview but tell WJZ they launched an internal investigation and have started dismissal hearings for the students allegedly involved.

“SEED is continuing to work with police,” a statement from the school reads. “It is our top priority to provide a safe and nurturing campus for our students to live and learn. We take seriously the trust our families place in us to keep their children safe and to handle unfortunate situations like this one thoughtfully and swiftly.”

“It concerns me that I can’t leave my child under their supervision,” parent Kenny Tomlin said. “It’s not safe.”

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While investigators get to the bottom of the allegation, the school says they’re working closely with the affected student and his family.