A man who was shot several times in Sydney's west is reportedly a member of the notorious Brothers 4 Life crime gang.
The latest incident comes less than a week after the fatal shooting of a man who was also linked to the group.
Police were called to the scene of the shooting at Winston Hills shortly after 11pm (AEDT) on Sunday.
When they arrived they found a 27-year-old with gunshot wounds.
Media reports say the man is suspected Brothers 4 Life gang member Michael Odisho and that he was hit multiple times in the arm and thigh while his mother was injured by shattered glass.
Mr Odisho's mother Loret told reporters on Monday that she didn't see anyone or anything.
"I don't know nothing, nothing," she told reporters, adding that her son was in surgery.
Superintendent Robert Redfern says the investigation is still in its early stages but all possible links are being examined.
"The primary victim is known to police, we don't believe in any way that this was a random event," he told reporters.
Neighbour Mal Mitchells said the shootings had shaken nearby residents.
"It's scary when it happens in this area," he told Fairfax Radio.
The shot man was treated at the scene and taken to hospital where he remains in a stable condition.
A crime scene has been set up and police are searching the area for the gunman.
It comes after two men who were affiliated with the same group were shot at Revesby just after midnight on Tuesday.
One man is believed to be Mahmoud Hamzy, the cousin of jailed Brothers 4 Life boss Bassam Hamzy.
The other man, Omar Ajaj, was treated for gunshot wounds to his leg and stomach.
Police said at least three people had attacked the pair in what may have been an internal dispute among gang members.