Sixteen people, including one of the gunmen, were killed in a fatal shooting on Bondi Beach on Sunday evening.
The shooting took place during an event marking the first day of Hannukkah at Bondi Beach, and New South Wales authorities said so far 15 people have died, including a 10-year-old girl.
The two gunmen who opened fire on the beach were father and son.
Australian Prime Minister Anthony Albanese said the shooting was “an act of pure evil, an act of antisemitism, an act of terrorism on our shores”.
NSW Premier, Chris Minns, echoed Albanese’s sentiments and urged those looking to help in a practical way to donate blood.
Following the attack, NSW police have ramped up security at all Hanukkah-related events.
One of the gunmen, 50-year-old Sajid Akram, was shot and killed by police and the other, 24-year-old Naveed Akram, remains in hospital under police guard.
Heavily armed police have raided the shooter's home in Bonnyrigg in south-west Sydney and the Airbnb in Campsie they were staying in.
NSW police have confirmed they are not looking for a third shooter.
“The 50-year-old male is a licensed firearms holder,” NSW Police Commissioner Mal Lanyon said.
“He has six firearms licensed to him. We are satisfied that we have six firearms, from the scene yesterday, but also as a result of the search warrant at the Campsie address.”
Lanyon also said 328 officers would be on the ground in the suburbs with a significant Jewish population on Monday under Operation Shelter.
Following the shooting, 42 people were taken to the hospital, including police officers responding to the scene.
NSW Health said 26 of the injured were in a stable condition.
This was the worst mass shooting in Australia since the Port Arthur massacre 29 years ago, which led to the country embracing stricter gun control.
Following the Bondi shooting, Minns said law reform on gun licenses would “almost certainly” take place.
“In these circumstances, it’s important that no stone is left unturned and NSW police are given time to conduct that investigation, but we have to do everything we possibly can to ensure that this doesn’t happen again,” he said.
