Shots were fired at two cars in Shalvey on Friday.
Police said they believed two men fired the shots in Piccolo Way at about 9.40pm.
They also believe the men were standing on a footpath and fled after the shooting.
The cars also drove away.
There were no reports of anyone being hurt.
Police searched the area but failed to find any trace of the men or the vehicles.
The cars were described as a light-coloured sedan and a small hatchback.
Police are investigating and urged anyone with any information to contact Mount Druitt detectives on 9675 0699 or Crime Stoppers on 1800 333 000.