Police in Corby are appealing for a member of the public who went to the aid of a young woman who was assaulted to contact them.
The man helped the woman in Woodnewton Way, Corby, between 6am and 7.30am on Saturday, December 28.
He gave her a glass of water and called a private hire car to take her home.
The woman was assaulted at a nearby property in the early hours of Saturday.
The man who helped her is asked to contact police on 101 or Crimestoppers on 0800 555 111.