Between 1.20am and 1.40am on Saturday, July 10, a woman walking in Drapery was approached by a group of men who surrounded her opposite Santander bank and made threats of sexual violence.
She was able to walk away and was physically unharmed, but was left very shaken.
Officers have now released a number of CCTV images of men they believe may have information relevant to the investigation and are asking the men pictured, or anyone who recognises them, to come forward.
The men pictured, or anyone with information about this incident, is asked to call Northamptonshire Police on 101.
Incident number: 21000385881