A Baltimore school tutor is under police investigation after a student in his care was left with a fractured jaw and two missing teeth.

Trayvon Grayson's mother says the 7-year-old suffered the injuries when the tutor threw him against a wall for acting unruly.

"I looked in the ambulance and there's my son, his face big, mouth bloody. I turned to the man, 'I said, 'This isn't regular restraint," Lateekqua Jackson told CNN affiiliate WBFF.

The incident happened at the City Springs Elementary School.

The tutor, an employee of the charter school operator Baltimore Curriculum Project, told police that he removed Trayvon from his class for misbehaving. The tutor said he then lost his footing and the boy "hit himself" on the wall, according to the affiliate.

That's an explanation Trayvon's mother doesn't buy.

"He can't throw himself into the wall and fracture his jaw and lose his teeth," she said. "He's only 7 years old. He's so small he's not going to do the damage to himself."

Larry Schugam, the executive vice president for the Baltimore Curriculum Project, said the incident made it "heartsick."

"This is an unusual, isolated incident for our schools, and we are participating in a thorough investigation into what exactly happened," Schugam told CNN. "Until that investigation is complete, the one employee involved has been suspended."

The Baltimore City Public Schools told CNN it is working with police and "will take any action warranted once the investigation is complete."

Source: CNN