Police are seeking information about a series of confrontations in Wellingborough town centre on Sunday night (March 9).
A number of incidents involving a group of people in Cannon Street and Cambridge Street took place, between 9pm and 9.30pm.
Police would like to speak to anyone who may have witnessed these confrontations, in particular a group of people on bicycles in Cambridge Street and Victoria Street who are believed to have witnessed what happened.
Officers also want to speak to those people involved in the incidents or who may have information about what happened.
Witnesses or anyone with information about this series of incidents, is asked to call Northamptonshire Police on 101 or Crimestoppers anonymously on 0800 555 111.