Man charged over Parramatta shooting

Police have arrested and charged another man in relation to the murder of police accountant Curtis Cheng in Parramatta last month.

Officers from the Joint Counter Terrorism Team and Middle Eastern Organised Crime Squad stopped the 22-year-old on Friday afternoon as he was driving at Ryde in north-west Sydney.

The man, from Marsfield in Sydney's north, has been charged with participating in a criminal group.

He was refused bail and is scheduled to appear at the Parramatta Bail Court on Saturday.

Mr Cheng was gunned down outside the NSW police headquarters in Parramatta in a terror attack that shocked the nation.

His killer, a 15-year-old schoolboy, was shot dead when police returned fire.

On Friday, the man accused of supplying the gun used to kill Mr Cheng was refused bail after being labelled a threat to community safety.

Talal Alameddine, 22, was charged with a string of offences after he allegedly supplied a .38 Smith & Wesson revolver to Raban Alou on October 2.

It's alleged 15-year-old Farhad Jabar used that revolver to gun down Mr Cheng the same day.

Alameddine's lawyers applied for him to be released on bail.