A man is being treated for gunshot wounds and police are investigating a possible drive-by shooting in Merrylands.
Police said they responded to reports of shots fired in Garnett Street just before 8pm last night.
Officers found bullet casings at the scene, which are now being examined by forensic experts.
Police said a man aged in his 20s presented at Auburn Hospital with gunshot wounds to his thigh about an hour after the report of shots being fired.
Investigators were told the man was transferred to another hospital for treatment and was in a stable condition.
Police said it was still unclear whether the man had sustained his injuries in the reported shooting at Merrylands.
The incident is at least the second shooting in western Sydney in two days.
Three residents were lucky not to be injured when shots were fired at a home in Winston Hills on Wednesday night.
Police are yet to charge anyone over a double shooting in Merrylands two months ago on August 15.
In that incident a man, 39, and woman, 27, took themselves to Auburn Hospital with gunshot wounds.
They told police a man driving a black sedan had shot them after a road rage incident on the corner of Rawson and Kihilla streets.
The day after that shooting, police said they had stopped a bikie feud blamed for a spate of shootings by arresting the major players.