A man suffered a broken jaw in two places after being punched in Wellingborough.
In an appeal launched today (January 8) police released a CCTV image of a man they want to speak to after the attack near Castello Lounge in Market Street.
A man in his 20s was punched by another man in an unprovoked attack between 2am and 3am on Saturday, December 7.
A police spokesman said: "The man in the image or anyone who recognises him should call Northamptonshire Police on 101.
"Alternatively you can call Crimestoppers anonymously on 0800 555111."