Five people escaped injury after several shots were fired into a home in Bidwill on Wednesday night.
Police believe the attack, which took place at a house on Dieffenbach Terrace about 10.25pm on May 17, was targeted.
The offenders fled the scene in a vehicle. There are no descriptions available for the shooter or getaway vehicle at this stage.
One female and four males were at home at the time of the shooting but none were injured.
A car was also set alight in front of the home soon before to the shooting, resulting in minor damage.
Mount Druitt police established a crime scene, and early indications suggest the incident was not a random attack.
Anyone with information should contact Crime Stoppers, 1800 333 000.