Kettering police are appealing for witnesses after a woman was sexually assaulted in the early hours of Sunday, November 4.
Detectives are hunting for three men who may have witnessed the 22-year-old woman getting into a car in the town centre to come forward.
The woman got into the yellow Volkswagen Beetle between 4.30am and 6am in the Regent Street area of town.
It is believed three men were walking along the pavement at the time the woman got into the car, and officers would like to speak to them about what they may have seen.
Shortly after getting into the car the 22-year-old woman was sexually assaulted. A 40-year-old man has been arrested and released on bail in connection with the incident.
Witnesses to this incident, or anyone with information, should call Northamptonshire Police on 101 or can call Crimestoppers anonymously on 0800 555111.