Former bikie boss Mahmoud "Mick" Hawi has died after being gunned down in broad daylight outside a Sydney gym.
The ex-leader of the Comancheros was shot - reportedly in the face - while in his car at the front of a Fitness First gym in Rockdale around midday on Thursday.
The 37-year-old went into cardiac arrest before being transferred to St George Hospital, where he later died, police told AAP.
Hawi served time in jail over his role in the killing of Hells Angels associate Anthony Zervas, who was bashed with a bollard during a brawl between the rival clubs at Sydney Airport in 2009.
Hawi's luxury black 4WD is parked in front of the gym's entrance on West Botany Street, with at least five bullet holes in its windows.
Reshan Mutukrishna, who owns a physiotherapy clinic inside the gym, said Hawi was a regular.
Mr Mutukrishna said he heard four loud bangs, which he initially thought were weights being dropped, before the gym was locked down.
"I heard a lot of screaming and shouting, I just thought maybe someone fell at the gym," he said.
"It's shocking. It's sad but it's not surprising."
NSW Police said the alleged shooter appeared to have fled in a vehicle, which was last seen on nearby Lindsay Street.
"A crime scene has been established and investigations are continuing," police said in a statement.
The Seven Network reports Hawi was ambushed as he got out of the car and was shot at close range.
Fitness First said it had closed the Rockdale gym until further notice.
"We are fully complying with the police investigation," a spokeswoman said.
"Our priority is ensuring our staff and members are provided the right support at this time."
Australian Associated Press