Two alleged members of the Lone Wolf motorcycle club, Yusuf Guney Nazlioglu and Ahmad Doudar, are accused of Hawi's murder while Moustafa Salam has been charged with being an accessary.

Hawi was shot multiple times and his luxury four-wheel-drive was peppered with bullets as he sat in the vehicle outside a Rockdale gym, in Sydney's south, in February.

Police claim that Nazlioglu, 37, and Ahmad Doudar, 38, had a financial motive, with Hawi's killing meant he didn't have to be paid further money.

The debt "related to a construction industry as opposed to any specific person", NSW Police Assistant Commissioner Malcolm Lanyon said on Saturday.

"It's the fact that people are brazen enough to be prepared to murder an individual for an amount of money that we find so appalling," he told reporters in Sydney.

The three accused were arrested on Friday and Mr Lanyon said more arrests were expected.

Nazlioglu and Doudar didn't apply for bail during their first court mention on Saturday.

Their lawyer Leo Premutico said they're expected to make a release application when they appear in Central Local Court next week. Salami will also seek bail when he faces court on Tuesday.

Hawi was released from prison in 2015 after being jailed over the 2009 bashing death of Hell's Angels associate Anthony Zervas in a wild brawl at Sydney Airport.

Australian Associated Press