Detectives investigating an assault in Kettering have released an image of a man they want to speak to.
Officers say the assault took place in the town in December but have not named the 25-year-old Leicester man who they want to track down.
They say he may be able to assist with their investigation and have urged him to make contact.
A police spokesman said: “Anyone with any information relating to his whereabouts can contact Northamptonshire Police on 101.
“Alternatively, they can call the independent charity Crimestoppers anonymously on 0800 555111.”