MADISON, Wis. -- The Madison Police Department on Wednesday released a sketch of a man they say sexually assaulted a 21-year-old woman while she was jogging on the city's East Side on Sunday night.

The incident occurred at about 9 p.m. in the 2200 block of East Washington Avenue when the woman, a University of Wisconsin-Madison student, was apparently grabbed from behind by a man.

The attacker pushed the woman to the ground, where he touched her inappropriately and then ran off, according to Madison police.

Police said the woman wasn't otherwise injured.

The man is described as a white man, 35 to 40 years old, weighs about 170 pounds and is about 5 feet 10 inches tall. The man was wearing a black stocking hat, dark jacket, a hooded sweatshirt, blue jeans and white tennis shoes.

Anyone with information is encouraged to call Crime Stoppers at 608-266-6014.