A Louisiana district attorney has opened a criminal investigation into an alleged sexual assault involving a student-athlete at Louisiana State University, ABC News reported.

The probe places the case in the hands of local prosecutors, who will determine whether evidence supports criminal charges. No arrest has been announced, and authorities have not publicly identified the athlete or the accuser.

LSU has not issued a detailed public statement on the investigation. The university's athletics department and campus police have not confirmed whether they are conducting a parallel inquiry under Title IX, the federal law that requires schools receiving federal funding to investigate reports of sexual violence.

The case adds to a growing list of sexual assault allegations tied to major college athletics programs in recent years, including high-profile investigations at Baylor University and Michigan State University. Those cases prompted federal scrutiny of how universities handle assault claims involving athletes and whether athletic departments improperly influence campus investigations.

Under Louisiana law, district attorneys have broad discretion over whether to bring charges after law enforcement completes its initial review. The timeline for a decision in this case is not known.

LSU is Louisiana's flagship public university and competes in the Southeastern Conference, one of the most-watched athletic conferences in the country. Its football program alone generated more than $100 million in revenue in recent years, according to university financial disclosures, making any criminal case involving a student-athlete a matter of significant public interest in the state.

Attorneys for the parties involved have not commented publicly. ABC News reported the investigation but did not identify the sources who confirmed it.

Sexual assault investigations involving college athletes often proceed on two tracks: a criminal case handled by local law enforcement and prosecutors, and a separate Title IX proceeding administered by the university. The two processes have different standards of proof — criminal cases require evidence beyond a reasonable doubt, while Title IX cases use a lower preponderance-of-the-evidence standard.

The district attorney's office has not released details about when the alleged assault occurred or where it took place.