The man who fatally stabbed six people in Sydney had mental health issues in the past and there was no indication ideology was a motive in the attack in one of the city's busiest shopping centres, police said on Sunday.
Cauchi's family recognised him and contacted police on Saturday after seeing news reports of the killings.
Witnesses described how Cauchi, wearing shorts and an Australian national rugby league jersey, ran through the Westfield Bondi Junction mall with a knife.
"This was a terrible scene," New South Wales Police Assistant Commissioner Anthony Cooke told reporters.
Five of the six people killed were women, and the male victim was a shopping centre security guard, police said.
Persons:
Joel Cauchi, Roger Lowe, Amy Scott, Anthony Cooke, Cauchi, Lowe, Ashlee Good
Organizations:
New, Queensland Police, Australian, rugby league, Westfield, New South Wales Police, Police
Locations:
Sydney, Queensland, New South Wales, Sydney's, New, Australia