A victim was left with facial injuries after being assaulted by five men in Kingswood, Wotton under Edge.
The incident happened outside of the Dinneywicks Inn pub, The Chipping, between 7-10pm on Friday, January 18.
It's believed that an altercation broke out during which the victim was targeted by approximately five men.
Police officers are now appealing for witnesses.
Anyone who saw the incident or has information which would help with enquiries is asked to call 101 quoting incident 423 of January 18.
Alternatively, you can submit information via Gloucestershire Police's online form: gloucestershire.police.uk/contact-us/tell-us-about-something/?incident=423&date=18-01-2019.
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