A woman was assaulted in the Charnwood Road area of Corby on Wednesday, August 8.
The 19-year-old woman was approached, pushed and struck in the face by two men sometime between 9.30pm and 9.55pm.
The first man was white, 5ft 5in and of slim build. He wore a black cap and a black scarf covering his face, a black jacket and tracksuit bottoms.
The second offender was white, 6ft, in his early twenties and of large muscular build. He also wore a scarf around his face and a hoodie.
Witnesses to this incident, or anyone with information about, can call Northamptonshire Police on 101 or information can be given anonymously to Crimestoppers on 0800 555111.