A group of Russian thugs stormed a gay club on 3 January, injuring several people there on a night out.
The unknown number of men bypassed the security at Fantom in Togliatti, a city in southwestern Russia.
At least one of the customers was hospitalized with serious injuries, local media reports, with at least three recieving medical care after being attacked.
Police say they currently have no suspects.
Konstantin Golava, a local gay activist, demanded a full investigation into the crime and to finally bring homophobic thugs to justice.