A man shot dead in Sydney's southwest was affiliated with the notorious Brothers 4 Life crime gang, police say.
The dead man and another man, who also suffered multiple bullet wounds, were well known to police, Deputy Commissioner Nick Kaldas said.
Mr Kaldas said the dead man had not yet been formally identified, however he is believed to be Mahmoud Hamzy, the cousin of jailed Brothers 4 Life boss Bassam Hamzy.
The men were found in a garage on Bardo Circuit in Revesby just after midnight on Tuesday.
The surviving man, Omar Ajaj, is being treated in hospital for gunshot wounds to his leg and stomach.
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"Both were well known to us and both men were affiliated with Brothers 4 Life," Mr Kaldas told a media conference.
"Clearly these people are involved in a criminal group and clearly the motives logically would have to be something to do with the illegal activities they've involved themselves in."
Mr Kaldas said at least three people had attacked the men and more than one weapon was used in what may have been an internal dispute among gang members.
"I know the group is called Brothers 4 Life, (but) there is a feeling among some police that they're lucky to be brothers for today," he said.
"They have as much conflict within the group as they do with outsiders."
A man, identified as a cousin of Mr Hamzy, joked to media outside the crime scene about the shooting.
"Yeah, fireworks went off. Someone got hit with the fireworks," the man, who wore a blue forensic suit, told the Seven Network.
A South Western Sydney Local Health District spokeswoman said the surviving victim was in a stable condition.
While Mr Kaldas said drive-by shootings had more than halved in the last two months, Opposition Leader John Robertson said the government needed to do more about gun violence.
"Last night we saw two shootings that brought the total this year to 104, and 286 since Barry O'Farrell was elected premier," he said.
"We have a government in NSW that's doing absolutely nothing when it comes to dealing with the criminals and thugs who continue to use guns on the streets of Sydney."
