PHILADELPHIA (CBS) – Philadelphia Police are investigating a report of indecent exposure on University of Pennsylvania’s campus.

Authorities say it happened Monday night at around 10 p.m. A 19-year-old woman said a man walked up to her and his genitals were exposed.  It occurred on the 3700 block of Locust Walk.

Authorities are describing the suspect as a black male in his 20’s. He is about 6’3” tall with a thin build and was last seen wearing all black clothing and a grey knit hat.

University Police surveyed the area but were unable to find the suspect. Philadelphia Police are asking anyone with information to please contact them at 215-686-8477.