A man had part of his ear bitten off in an unprovoked attack as he walked home from a night out with friends in Nottingham city centre.
Officers from Nottinghamshire Police have launched an appeal for witnesses after the attack, which also left the victim with bruising and a cut to the bridge of his nose.
The incident occurred on Heathcote Street in the city, at around 3am on Wednesday, February 18.
Police would like to speak to the two men pictured in connection with the assault.
The first man is described as white with short wavy dark hair, a black waist-length jacket and jeans.
The second man is described as white with fair hair, wearing a green Parker-type jacket, with a cream jumper and black trousers.
If you recognise either of these men or think you can help, call Nottinghamshire Police on 101 or call Crimestoppers anonymously on 0800 555 111, quoting incident number 90 of 18 February 2015.