A man was punched in the face by a stranger in a Northampton town centre street.
The alleged incident happened in Robert Street, The Mounts, at about 6am on Saturday, November 21.
The man was punched in the face, causing his nose and mouth to bleed.
Witnesses, or anyone who knows anything about this incident can call Northamptonshire Police on 101.
Alternatively, they can call the independent charity Crimestoppers anonymously on 0800 555 111 or use the anonymous online form at www.crimestoppers-uk.org.