D.C. police are investigating a report that a female student at Sidwell Friends school was raped Monday by a male student on the campus of the elite private institution.

The report says the female student told police she was forced to have sex without giving consent. It was not clear where on campus the incident she reported to police occurred.

A police report indicated the incident occurred Wednesday, but authorities later said it occurred Monday.

The female student and the alleged attacker had a prior sexual relationship, according to the police report. A police spokesman said the female student is in her “upper teens.”

No arrests had been made as of Thursday evening.

The Upper School of Sidwell Friends is located in the 3800 block of Wisconsin Avenue NW.

Ellis Turner, the associate head of school, said in a statement that “It is the longstanding policy of Sidwell Friends School to cooperate fully with any law enforcement investigation. It is also our policy not to comment on such investigations.”