A 21-year-old woman was sexually assaulted by a stranger after being followed along S. Park Street at 2:40 a.m. Wednesday morning, according to UW-Madison Crime Alert.

According to the crime report, the victim was grabbed from behind while walking in Fahrenbrook Court after going out with friends in the State Street area. The perpetrator threatened to shoot her, however no weapon was seen, the report said.

The assault occurred in a parking lot and the suspect fled south on N. Mills Street afterwards. The suspect is described as a  6-foot-tall black male with a muscular build, short hair and facial stubble wearing a light colored t-shirt and shorts, the report says.

The Madison Police Department is currently investigating the case and are updating details on their website, police spokesperson Joel DeSpain said.