Sydney shooting: Arrests over Curtis Cheng killing

Four people have been detained in Sydney, Australia, in connection with the killing of police worker Curtis Cheng.

Mr Cheng was shot dead outside his office on Friday in what police are treating as a terror attack.

More than 200 officers swooped on several properties early on Wednesday, police said, arresting males aged between 16 and 22.

A fifth man was held over unrelated fraud charges.

Jon Donnison reports.