Police are appealing to witnesses following a sexual assault at the State Library on June 27.
Investigators have been told a 20-year-old Melbourne woman was waiting outside the library at about 6.30pm.
An unknown male offender approached her, struck up a conversation and asked to give her a massage before sexually assaulting her.
Shortly afterwards the man said he needed to catch a train from Melbourne Central Station and left the scene in an unknown direction.
The man is perceived to be of Indian Sub-Continental appearance, aged in his mid-20s to early 30s with a solid build, brown or black curly hair and dark coloured eyes. He was wearing a red hooded jumper, dark pants, light-coloured sneakers and a watch at the time.
Crime Stoppers: 1800 333 000