Police are investigating an aggravated burglary which occurred at a flat in the Ard Grange area early on Sunday, May 22.
As a result of the incident a 21-year-old man was treated in hospital for non-life threatening head injuries.
Another 21-year-old man was arrested and later released on police bail pending further enquiries.
Detective Constable Donnell said police are keen to speak to anyone who may have witnessed a number of males in the street sometime around 3.30am to 4am. Anyone with information should dial 101, or Crimestoppers on 0800 555 111.