Four men, aged 27, 25, 18 and 17 years, were stabbed following a large scale disturbance in Whatriggs Road, Kilmarnock, around 1:30am this morning Saturday 1 April 2017.
All were taken to Crosshouse Hospital where they were treated and have since been released.
Officers are currently checking CCTV and carrying out house to house enquiries in the area.
Whilst a number of people have already come forward to police with information, officers would still like to hear from others who saw the incident take place or who may have information that will assist with the investigation.
Witnesses can contact Kilmarnock CID via the non-emergency number 101 or Crimestoppers on 0800 555 111 where details can be given in confidence.