A 22-year-old man has been arrested in connection with the sexual assault of an 18-year-old woman, which took place at around 8.50pm on Thursday, March 1.
She was assaulted by a man while she was walking along the Rothwell Road towards Desborough.
The man has been released on police bail.
Enquiries are ongoing and detectives investigating the incident are once again appealing for witnesses.
Officers are also re-appealing for witnesses in relation to another assault which took place on Sunday, January 29, where an Asian male exposed himself to two 16-year-old girls in the Rothwell area. The description of the man involved in that incident is about 30 years old, 5ft 8ins tall and of proportionate build.