University of Virginia police say they're investigating a report that a student was sexually assaulted at an on-campus residence hall.

A letter to students from Police Chief Michael Gibson says the department received information Thursday from the Dean of Students about the allegations.

The letter says a student reported the assault Jan. 30.

No further details were immediately available. A spokeswoman for campus police couldn't immediately be reached.

The investigation comes after Rolling Stone magazine published a story describing a culture of sexual violence at the school. That article — which focused on an alleged gang rape at a fraternity house — was later discredited by the magazine's editors, but campus and fraternity leaders have been under pressure to propose reforms.

State lawmakers are weighing legislation to mandate reporting of alleged campus sexual assaults.