Party-goers have been robbed of their wallets, phones and passports at a rave in an abandoned building.
Police are searching for a man and woman they believe could be connected to the incident in inner Melbourne.
The party was organised at an abandoned building on Fogarty Avenue in Yarraville about 2am on June 10.
Police were told five strangers assaulted the ravers and stole wallets, mobile phones, bags and passports.
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The offenders were described as male and female aged in their 20s and wearing dark clothing.
Police have released digital images of a man and a woman they would like to speak to and are appealing for witnesses.