Melbourne Crime Investigation Unit detectives are investigating an attempted abduction of a woman in Southbank on 18 January.
An unknown male has followed a 23-year-old woman for at least two blocks to an apartment building on Kavanagh Street just after 2am.
The woman entered her building via the carpark, the male entering the building behind her.
The woman was unaware of the male until he got into the lift with her.
She got out at her floor and walked toward her door when the male grabbed her from behind, covering her nose and mouth with one hand and had the other around her waist, pulling her away from the door.
The woman was able to grab her door handle and fall into her apartment where her housemates came to her aid and the offender ran off.
The man is described as being aged in his 20s, thin build, brown eyes, dark eyebrows and clean shaven.
He was wearing a black hooded top, blue jeans, black runners with white edges and a black cap with a white logo.
Investigators have released CCTV footage of a man they believe may be able to assist with their enquiries.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online www.crimestoppersvic.com.au