A teacher at a Leesburg preschool was arrested Tuesday and charged with sexually assaulting a 4-year-old student, according to the Leesburg Police Department.

Brad R. Minor, 23, of Leesburg, was charged with one count of forcible sodomy in the assault that authorities said took place at the Chesterbrook Academy Preschool in early March.

Police said they received a complaint from the family of the 4-year-old girl on March 7, after the child made comments to her parents.

Jeff Dubé, spokesman for the Leesburg Police Department, said the investigation was ongoing and police would examine whether other students might have been victims of sexual assault. No similar complaints have been received so far, Dubé said.

“That’s always a concern when you’re dealing with a facility such as this,” Dubé said. “It’s something that we’ll certainly look into.”

The principal of Chesterbrook Academy Preschool, Jenny McKenney, was informed of the incident and cooperated with the investigation, police said.

In a written statement released Wednesday afternoon, school officials said Minor has been terminated. “We are deeply concerned for the child involved in this incident,” the statement read.

The school said in the statement that officials there learned of an allegation against Minor in March and he was placed on leave.

Kathleen Shaffer, a spokeswoman for Chesterbrook Academy, said that the school later received a letter, dated April 27, from Child Protective Services stating that “the case was closed and the claim unfounded.” Minor — a bus driver and teacher who supervised before and after-school activities — was reinstated on May 3. He was fired on July 6, immediately after the school learned of his arrest, Shaffer said.

Shaffer said that school officials had done a criminal background check on Minor before he was hired, and it showed no record of criminal activity or child abuse.

“He’d never given us any indication to think he was dangerous,” Shaffer said.

Dubé declined to comment on any investigation by Child Protective Services, but said the case was never closed by Leesburg Police.

“Our charges were placed after the collection and examination of forensic evidence, which led to the arrest of Mr. Minor,” he said.

Heather Dziewalski, a spokeswoman for Child Protective Services, would not comment on any aspect of the case, citing confidentiality concerns.

Minor remains held in the Loudoun County Adult Detention Center without bond, according to authorities.

This Post has been updated.