Another four people are being questioned over the killing of a civilian police worker by a 15-year-old boy in Australia. Paul Chapman reports.
Another four people are being questioned over the shooting of a police accountant in Sydney after a series of raids on Wednesday. Australian police arrested men and boys aged between 16 and 22 they believe may have been involved in planning the attack. The killer was a 15-year-old who was himself shot dead by officers at the scene. New South Wales police say they're treating the attack as a terrorist act. (SOUNDBITE)(English) CATHERINE BURN, NEW SOUTH WALES POLICE FORCE DEPUTY COMMISSIONER, SAYING: "What we're investigating is a terrorism offence so what we would suggest and we suspect is that there was some influence, whether it was ideologically, religious, or politically motivated, that determined and influenced the 15-year-old to go and commit this horrendous act of violence." Investigators also say they want to talk to the sister of the teenage gunman who vanished the day before the attack but that there's nothing to suggest she was involved. Some of those targeted in Wednesdays' raids were similarly targeted a year ago in an operation police said had prevented a beheading plot.