Officers investigating an alleged assault in Kettering Road, Northampton, have asked any witnesses to come forward.
The attack happened at about 2pm on Sunday, May 17, close to the Costcutter store and saw a man push a woman to the floor.
The man was aged between 20 and 25, of medium build, with black hair.
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