Detectives are trying to find two men in connection with an alleged serious sexual assault in Sheffield last October. A 48 year old woman had been out in the city centre and finished the evening at West Street Live, where two unidentified men befriended her. They then left the bar and she was taken to somewhere nearby and allegedly raped by the two men. Afterwards she was dropped off in the Burngreave area where she told a local shopkeeper about what had happened. Police have today released CCTV images of two men they want to speak to about the assault. Anyone with information is urged to contact South Yorkshire Police on 101 quoting incident number 240 of Saturday, 8 October 2011. Alternatively contact Crimestoppers anonymously on 0800 555 111.