A man has died in a shooting in Sydney's southwest overnight.


Police said they were called to Owen Street in Punchbowl at around 11.15pm (AEDT) on Tuesday, following reports that a man had been shot.


Police and NSW Ambulance paramedics attended the scene and found a man, aged in his 20s, with gunshot wounds.


He died at the scene.


A crime scene has been established by police.


Owen Street Punchbowl is closed to traffic while investigators examine the scene, police said.


AAP