Officers were called to Church Walk in the early hours of Sunday, October 18.
A 17-year-old man has since been arrested and bailed on suspicion of assault following the incident.
Police believe the driver of the vehicle may have information which could assist with the investigation.
Call police on 101, quoting incident number 140 of 18 October. Alternatively, call Crimestoppers anonymously on 0800 555 111