A teenager was assaulted near to the shops in Willow Brook Road, Corby, on Saturday night.
The 18-year-old was assaulted following an altercation with another man at about 10.40pm on Saturday, October 1.
The offender was a white man, aged 20 to 30, about 6ft 5ins and wearing blue jeans and a grey top.
A police spokesman said: “Officers would like to speak to anyone who may have witnessed this incident or who may have any information regarding it.
“Witnesses or anyone with information about this incident can contact police on 101 or Crimestoppers anonymously on 0800 555 111.”