A man needed stitches after a bottle was thrown during a bar fight in Milton Keynes on Sunday.
The 20-year-old suffered a cut lip and was treated in hospital following the assault on the ground floor of Lloyds in Savoy Crescent at around 2am.
The offender was white and in his early twenties. He was around 5ft 10ins tall and of medium build with short dark hair.
He was wearing blue jeans and a white T-shirt with distinctive bands across the body.
Anyone with information is asked to contact investigating officer PC Steven King from Milton Keynes Police Station on 101.
If you don’t want to speak directly to the police you can contact Crimestoppers anonymously on 0800 555 111 or online at crimestoppers-uk.org.
No personal details are taken, information is not traced or recorded and you will not go to court.