The two gunmen involved in the Bondi Beach shooting were a father and son, police have revealed.
The 50-year-old father was shot dead by police during the attack.
His son, Naveed Akram, 24, remains in hospital under police guard, sources told the ABC.
Akram, a recently unemployed bricklayer from Sydney, had told his family he was going away for the weekend.
Fifteen people were killed and 38 were injured during the Hanukkah celebration in Sydney on Sunday evening local time.