Three people sitting in parked cars have been injured in a public shooting incident before dawn on Sunday in south-west Sydney.

Police said two men and a woman were in two separate vehicles when the violent attack took place in Greenacre about 2.15am.

Emergency services were called to Mayvic Street to treat the victims.

“NSW Ambulance paramedics have treated a man found injured in one parked vehicle, as well as a man and woman in a separate parked vehicle,” said a NSW Police media statement.

“All have been taken to hospital, their conditions are unknown.”

About five minutes after the shooting, a vehicle was reported alight in Amy Street, Regents Park.

Police said inquiries are underway to determine if the incidents were linked.

The car fire spread to a wooden fence and tree with Fire and Rescue NSW teams attending to extinguish the blaze.

Crime scenes have been established in Greenacre and Regents Park and an investigation has commenced by officers attached to Auburn Police Area Command.

Detectives are appealing for anyone who was in the vicinity of either location between 2am and 2.30am and has information or dashcam vision to contact Auburn Police or Crime Stoppers on 1800 333 000.

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