A 20-year-old man suffered a broken cheekbone and jaw after an assault in Huddersfield.
The assault happened at Tokyo nightclub in Huddersfield in the early hours of Sunday, September 15.
The incident occurred between 2.30am and 2.45am at the Queen Street venue.
The man responsible is described as white, aged in his mid to late 20s, around 6ft tall, of stocky/muscular build with light brown, short hair.
Anyone who witnessed this incident or who has any information which could help the investigation should call DC Annette Lane at Huddersfield CID on the non-emergency number 101 or independent charity Crimestoppers anonymously on 0800 555 111.