While inside the property, the offenders stole a white Apple MacBook Pro, a quantity of United States currency and a money travel card.
Police believe that the two men made four unsuccessful attempts to withdraw money using the money travel card at an ATM on Percy Street, Portland about 3.20am on March 17.
A further attempt is believed to have been made by an unknown female at approximately 11.10pm on March 17 at an ATM on Malop Street, Geelong
As such the unknown female offender may be connected to the unknown males and maybe from the south west region.
Investigators have released images of the unknown female who they believe can assist with their enquiries and is described as female, wearing a dark hoodie, cream pants and aged 18 to 30
Anyone with information is urged to contact Warrnambool Police on 5560 1174 or Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimestoppersvic.com.au