The suspected gunmen in the Bondi Beach attack threw explosives at the start of the deadly incident and had practised shooting weeks before, according to new court documents.
They allege the pair meticulously planned the attack for months and, two days prior to the shooting, visited Bondi for reconnaissance.
Fifteen people were killed and dozens more injured when two gunmen opened fire on a Hanukkah celebration on 14 December. Explosives, including a tennis ball bomb, failed to detonate, the documents said.
Naveed Akram, 24, has been charged with 59 offences, including 15 counts of murder and one of terror. A second gunman - his father, Sajid Akram - was shot dead by police at the scene.
Last week, a temporary suppression order was made on the release of the police fact sheet to protect the identities of the survivors. It was revoked on Monday and the documents were published with some redactions.
Included in the new court documents are the details of several videos tracing the movements of the alleged gunmen in the months, days, and hours before the attack.
One video - taken on one of their mobile phones in October - is described as showing the men sitting in front of an image of an Islamic State group (IS) flag.
They are heard making statements about their motivations for the attack and condemn the acts of 'Zionists', police say. Naveed Akram is also recorded appearing to recite, in Arabic, a passage from the Quran.
Police said separate footage from October shows the father and son conducting firearms training in a countryside location, believed to be in New South Wales. They are seen firing shotguns and moving in a tactical manner, officials added.
CCTV footage from the evening of 12 December is said to show two males believed to be the accused and his father in their car next to Bondi Beach.
The documents note these include two single barrel shotguns, a Beretta rifle, four improvised explosive devices (IEDs) and two IS flags. At around 02:00 (15:00 GMT) on the day of the attack, two men were captured on CCTV leaving rented accommodation in the Sydney suburb of Campsie carrying long and bulky items wrapped in blankets.
Police allege a homemade bomb was found in the boot of the Akrams' vehicle.
On Sunday, Australian Prime Minister Anthony Albanese faced backlash and was booed at a memorial event attended by tens of thousands of people. He has since promised to enhance measures against extremism and reassess intelligence protocols surrounding potential threats. There are growing calls for a Royal Commission into the Bondi attack, as the community grapples with the implications of the incident and pushes for stringent gun laws.
