A man suffered a serious head injury following a fight at the Kempston Hardwick caravan site in the lead up to Christmas.
Police are appealing for any witnesses to come forward.
Officers investigating the incident, which took place at around 11.15pm on Wednesday, December 23, would like to hear from anyone with any knowledge of what took place.
DC Matt Inwood, investigating, said: “We have carried out a number of enquiries to date but I am still keen to speak to witnesses to this assault, as I am aware there were many people passing by in the street at the time.
“Anyone who was in this area and saw the incident, or anything suspicious around that time, should call 101 or Crimestoppers on 0800 555 111.”