A 44-year-old man has been assaulted by a group of around ten men in Cleckheaton.
The assault happened in a car park on Cross Crown Street and Northgate on August 4 between 1.30am and 2am.
The victim was confronted by the group and subsequently attacked. He was transported to hospital for treatment to a head injury.
One of the suspects is described as having short hair and wearing dark clothing.
Any witnesses or anyone with any information is asked to contact PC Glyne Jordan at Heckmondwike Police Station on the non emergency number 101.
Alternatively, call Crimestoppers anonymously on 0800 555 111.