Police are seeking a man who assaulted a woman inside a Massachusetts College of Art and Design building last weekend.

Police said the woman was in the campus building at 621 Huntington Ave. about 4 p.m. Friday when the man approached her from behind, attacked her and then tried to sexually assault her. The woman struggled and the man fled.

Police described the suspect as a black man, between 25- and 35-years-old and weighing about 250 pounds. Anyone with information should call 617-343-4400.