Police in Wellingborough are appealing for witnesses after a woman was assaulted outside a school in the town on Tuesday, 8 March.
The 19-year-old was allegedly assaulted by a man at some point between 8.50am and 9.10am outside Olympic Primary School, in Olympic Way.
Members of the public did witness the incident and police officers would like to speak to them, particularly a man who told the offender to stop.
The woman sustained bruising and swelling to her head as a result of the incident.
Witnesses or anyone with information about this incident is asked to contact police on 101 or Crimestoppers anonymously on 0800 555 111.