The boy, whose identity was withheld, was also charged with assaulting and intimidating police.
Australian police have arrested five men in connection with the fatal shooting of a police department accountant, the New South Wales Police Force said Wednesday morning.
The arrests were made as part of a joint investigation by the NSW Joint Counter Terrorism Team (JCTT) and State Crime Command Homicide Squad.
“The five men have been taken into custody and will be taken to various police stations where they will be interviewed in relation to Friday?s fatal shooting”.
On Friday, a 58-year-old New South Wales police civilian worker was shot dead as he was leaving the NSW police headquarters near Sydney.
On Tuesday, police arrested a 17-year-old boy on his way to the same school were Jabar was a pupil, charging him with offences related to the use of social media to harass and intimidate.
He is due to front a children’s court on November 9.
Jabar, who authorities said was born in Iran of Iraqi and Kurdish background and had no criminal history prior to the incident, was killed in an exchange of fire with police after shooting Cheng. A staunch ally of the United States and its battle against Islamic militants in Iraq and Syria, Australia has been on heightened alert for attacks by home-grown radicals since past year.
It’s believed she flew through Singapore to Istanbul.
Over the weekend, a mosque close to the police building was searched by detectives. “The gunman’s exact motivations remain a mystery”, Scipione said in a news release.